431090028 has 36 divisors (see below), whose sum is σ = 1099353528. Its totient is φ = 142423680.

The previous prime is 431090027. The next prime is 431090047. The reversal of 431090028 is 820090134.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×431090028² = 371677224482081568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 431089983 and 431090010.

It is not an unprimeable number, because it can be changed into a prime (431090027) 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, 48918 + ... + 57053.

It is an arithmetic number, because the mean of its divisors is an integer number (30537598).

Almost surely, 2^431090028 is an apocalyptic number.

It is an amenable number.

431090028 is an abundant number, since it is smaller than the sum of its proper divisors (668263500).

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

431090028 is a wasteful number, since it uses less digits than its factorization.

431090028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106094 (or 106089 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 431090028 is about 20762.7076268968. The cubic root of 431090028 is about 755.4214730766.

The spelling of 431090028 in words is "four hundred thirty-one million, ninety thousand, twenty-eight".