30252640 has 48 divisors (see below), whose sum is σ = 77973840. Its totient is φ = 11000320.

The previous prime is 30252619. The next prime is 30252641. The reversal of 30252640 is 4625203.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30252641) 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 7 ways as a sum of consecutive naturals, for example, 6835 + ... + 10354.

It is an arithmetic number, because the mean of its divisors is an integer number (1624455).

Almost surely, 2^30252640 is an apocalyptic number.

It is an amenable number.

30252640 is an abundant number, since it is smaller than the sum of its proper divisors (47721200).

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

30252640 is a wasteful number, since it uses less digits than its factorization.

30252640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17215 (or 17207 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 30252640 is about 5500.2399947639. The cubic root of 30252640 is about 311.5930482162.

Adding to 30252640 its reverse (4625203), we get a palindrome (34877843).

It can be divided in two parts, 3025 and 2640, that added together give a palindrome (5665).

The spelling of 30252640 in words is "thirty million, two hundred fifty-two thousand, six hundred forty".