423728431 has 12 divisors (see below), whose sum is σ = 497794680. Its totient is φ = 359595600.

The previous prime is 423728423. The next prime is 423728447. The reversal of 423728431 is 134827324.

It is not a de Polignac number, because 423728431 - 2³ = 423728423 is a prime.

It is a super-2 number, since 2×423728431² = 359091566475443522, 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 (423728401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37861 + ... + 47758.

It is an arithmetic number, because the mean of its divisors is an integer number (41482890).

Almost surely, 2^423728431 is an apocalyptic number.

423728431 is a deficient number, since it is larger than the sum of its proper divisors (74066249).

423728431 is a wasteful number, since it uses less digits than its factorization.

423728431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85734 (or 85727 counting only the distinct ones).

The product of its digits is 32256, while the sum is 34.

The square root of 423728431 is about 20584.6649474797. The cubic root of 423728431 is about 751.0967249589.

The spelling of 423728431 in words is "four hundred twenty-three million, seven hundred twenty-eight thousand, four hundred thirty-one".