431407720 has 16 divisors (see below), whose sum is σ = 970667460. Its totient is φ = 172563072.

The previous prime is 431407709. The next prime is 431407729. The reversal of 431407720 is 27704134.

It can be written as a sum of positive squares in 2 ways, for example, as 378146916 + 53260804 = 19446^2 + 7298^2 .

It is a super-2 number, since 2×431407720² = 372225241751196800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (431407729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5392557 + ... + 5392636.

Almost surely, 2^431407720 is an apocalyptic number.

431407720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

431407720 is an abundant number, since it is smaller than the sum of its proper divisors (539259740).

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

431407720 is a wasteful number, since it uses less digits than its factorization.

431407720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10785204 (or 10785200 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 431407720 is about 20770.3567615003. The cubic root of 431407720 is about 755.6069969141.

The spelling of 431407720 in words is "four hundred thirty-one million, four hundred seven thousand, seven hundred twenty".