30400631 has 8 divisors (see below), whose sum is σ = 31326864. Its totient is φ = 29488320.

The previous prime is 30400621. The next prime is 30400637. The reversal of 30400631 is 13600403.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30400631 is a prime.

It is a super-2 number, since 2×30400631² = 1848396730396322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30400637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1040 + ... + 7866.

It is an arithmetic number, because the mean of its divisors is an integer number (3915858).

Almost surely, 2^30400631 is an apocalyptic number.

30400631 is a deficient number, since it is larger than the sum of its proper divisors (926233).

30400631 is an equidigital number, since it uses as much as digits as its factorization.

30400631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6961.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 30400631 is about 5513.6767224784. The cubic root of 30400631 is about 312.1003094899.

The spelling of 30400631 in words is "thirty million, four hundred thousand, six hundred thirty-one".