30374640 has 60 divisors (see below), whose sum is σ = 102010584. Its totient is φ = 8099712.

The previous prime is 30374627. The next prime is 30374647. The reversal of 30374640 is 4647303.

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30374647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20374 + ... + 21813.

Almost surely, 2^30374640 is an apocalyptic number.

30374640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30374640 is an abundant number, since it is smaller than the sum of its proper divisors (71635944).

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

30374640 is a wasteful number, since it uses less digits than its factorization.

30374640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42206 (or 42197 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 27.

The square root of 30374640 is about 5511.3192613021. The cubic root of 30374640 is about 312.0113408107.

The spelling of 30374640 in words is "thirty million, three hundred seventy-four thousand, six hundred forty".