30263640 has 128 divisors (see below), whose sum is σ = 100465920. Its totient is φ = 7232000.

The previous prime is 30263633. The next prime is 30263647. The reversal of 30263640 is 4636203.

It is an interprime number because it is at equal distance from previous prime (30263633) and next prime (30263647).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 30263640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30263647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133207 + ... + 133433.

It is an arithmetic number, because the mean of its divisors is an integer number (784890).

Almost surely, 2^30263640 is an apocalyptic number.

30263640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30263640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50232960).

30263640 is an abundant number, since it is smaller than the sum of its proper divisors (70202280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30263640 is a wasteful number, since it uses less digits than its factorization.

30263640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353 (or 349 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 30263640 is about 5501.2398602497. The cubic root of 30263640 is about 311.6308091983.

Adding to 30263640 its reverse (4636203), we get a palindrome (34899843).

It can be divided in two parts, 30263 and 640, that added together give a palindrome (30903).

The spelling of 30263640 in words is "thirty million, two hundred sixty-three thousand, six hundred forty".