30400431 has 8 divisors (see below), whose sum is σ = 40559664. Its totient is φ = 20254080.

The previous prime is 30400423. The next prime is 30400451. The reversal of 30400431 is 13400403.

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

It is not a de Polignac number, because 30400431 - 2³ = 30400423 is a prime.

It is a super-2 number, since 2×30400431² = 1848372409971522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30400431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30400451) 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, 6375 + ... + 10071.

It is an arithmetic number, because the mean of its divisors is an integer number (5069958).

Almost surely, 2^30400431 is an apocalyptic number.

30400431 is a deficient number, since it is larger than the sum of its proper divisors (10159233).

30400431 is a wasteful number, since it uses less digits than its factorization.

30400431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6441.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 30400431 is about 5513.6585857305. The cubic root of 30400431 is about 312.0996250721.

Adding to 30400431 its reverse (13400403), we get a palindrome (43800834).

The spelling of 30400431 in words is "thirty million, four hundred thousand, four hundred thirty-one".