431621004 has 12 divisors (see below), whose sum is σ = 1007115704. Its totient is φ = 143873664.

The previous prime is 431620979. The next prime is 431621009. The reversal of 431621004 is 400126134.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (431621009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17984197 + ... + 17984220.

Almost surely, 2^431621004 is an apocalyptic number.

It is an amenable number.

431621004 is an abundant number, since it is smaller than the sum of its proper divisors (575494700).

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

431621004 is a wasteful number, since it uses less digits than its factorization.

431621004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35968424 (or 35968422 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 431621004 is about 20775.4904635246. The cubic root of 431621004 is about 755.7314981103.

Adding to 431621004 its reverse (400126134), we get a palindrome (831747138).

The spelling of 431621004 in words is "four hundred thirty-one million, six hundred twenty-one thousand, four".