30442440 has 64 divisors (see below), whose sum is σ = 104376960. Its totient is φ = 6958080.

The previous prime is 30442439. The next prime is 30442441. The reversal of 30442440 is 4424403.

It is an interprime number because it is at equal distance from previous prime (30442439) and next prime (30442441).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30442441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17281 + ... + 18960.

It is an arithmetic number, because the mean of its divisors is an integer number (1630890).

Almost surely, 2^30442440 is an apocalyptic number.

30442440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30442440 is an abundant number, since it is smaller than the sum of its proper divisors (73934520).

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

30442440 is a wasteful number, since it uses less digits than its factorization.

30442440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36262 (or 36258 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 30442440 is about 5517.4668100497. The cubic root of 30442440 is about 312.2433177566.

Adding to 30442440 its reverse (4424403), we get a palindrome (34866843).

The spelling of 30442440 in words is "thirty million, four hundred forty-two thousand, four hundred forty".