23431404 has 24 divisors (see below), whose sum is σ = 54774720. Its totient is φ = 7795984.

The previous prime is 23431399. The next prime is 23431409. The reversal of 23431404 is 40413432.

It is an interprime number because it is at equal distance from previous prime (23431399) and next prime (23431409).

It is a super-2 number, since 2×23431404² = 1098061386822432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23431409) 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, 6427 + ... + 9389.

It is an arithmetic number, because the mean of its divisors is an integer number (2282280).

Almost surely, 2^23431404 is an apocalyptic number.

It is an amenable number.

23431404 is an abundant number, since it is smaller than the sum of its proper divisors (31343316).

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

23431404 is a wasteful number, since it uses less digits than its factorization.

23431404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3629 (or 3627 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 23431404 is about 4840.5995496426. The cubic root of 23431404 is about 286.1537471873.

Adding to 23431404 its reverse (40413432), we get a palindrome (63844836).

The spelling of 23431404 in words is "twenty-three million, four hundred thirty-one thousand, four hundred four".