431239028 has 24 divisors (see below), whose sum is σ = 824154240. Its totient is φ = 195808320.

The previous prime is 431238979. The next prime is 431239037. The reversal of 431239028 is 820932134.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 431238985 and 431239003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41000 + ... + 50432.

It is an arithmetic number, because the mean of its divisors is an integer number (34339760).

Almost surely, 2^431239028 is an apocalyptic number.

It is an amenable number.

431239028 is a deficient number, since it is larger than the sum of its proper divisors (392915212).

431239028 is a wasteful number, since it uses less digits than its factorization.

431239028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10487 (or 10485 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 431239028 is about 20766.2954808989. The cubic root of 431239028 is about 755.5084965340.

The spelling of 431239028 in words is "four hundred thirty-one million, two hundred thirty-nine thousand, twenty-eight".