45431028 has 18 divisors (see below), whose sum is σ = 114839634. Its totient is φ = 15143664.

The previous prime is 45430997. The next prime is 45431041. The reversal of 45431028 is 82013454.

It can be written as a sum of positive squares in only one way, i.e., 43322724 + 2108304 = 6582^2 + 1452^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×45431028³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 45430992 and 45431010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 630951 + ... + 631022.

Almost surely, 2^45431028 is an apocalyptic number.

It is an amenable number.

45431028 is an abundant number, since it is smaller than the sum of its proper divisors (69408606).

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

45431028 is a wasteful number, since it uses less digits than its factorization.

45431028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261983 (or 1261978 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 45431028 is about 6740.2542978733. The cubic root of 45431028 is about 356.8213686285.

The spelling of 45431028 in words is "forty-five million, four hundred thirty-one thousand, twenty-eight".