431428 has 6 divisors (see below), whose sum is σ = 755006. Its totient is φ = 215712.

The previous prime is 431423. The next prime is 431429. The reversal of 431428 is 824134.

It can be written as a sum of positive squares in only one way, i.e., 334084 + 97344 = 578^2 + 312^2 .

It is a super-2 number, since 2×431428² = 372260238368, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 431399 and 431408.

It is not an unprimeable number, because it can be changed into a prime (431423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53925 + ... + 53932.

2⁴³¹⁴²⁸ is an apocalyptic number.

It is an amenable number.

431428 is a deficient number, since it is larger than the sum of its proper divisors (323578).

431428 is a wasteful number, since it uses less digits than its factorization.

431428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107861 (or 107859 counting only the distinct ones).

The product of its digits is 768, while the sum is 22.

The square root of 431428 is about 656.8317897301. The cubic root of 431428 is about 75.5618836812.

The spelling of 431428 in words is "four hundred thirty-one thousand, four hundred twenty-eight".