431401128 has 16 divisors (see below), whose sum is σ = 1078502880. Its totient is φ = 143800368.

The previous prime is 431401123. The next prime is 431401169. The reversal of 431401128 is 821104134.

It is a super-2 number, since 2×431401128² = 372213866479344768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 17975047 = 431401128 / (4 + 3 + 1 + 4 + 0 + 1 + 1 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 431401098 and 431401107.

It is not an unprimeable number, because it can be changed into a prime (431401121) 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, 8987500 + ... + 8987547.

It is an arithmetic number, because the mean of its divisors is an integer number (67406430).

Almost surely, 2^431401128 is an apocalyptic number.

It is an amenable number.

431401128 is an abundant number, since it is smaller than the sum of its proper divisors (647101752).

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

431401128 is a wasteful number, since it uses less digits than its factorization.

431401128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17975056 (or 17975052 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 431401128 is about 20770.1980732009. The cubic root of 431401128 is about 755.6031482836.

The spelling of 431401128 in words is "four hundred thirty-one million, four hundred one thousand, one hundred twenty-eight".