45431992 has 16 divisors (see below), whose sum is σ = 88889040. Its totient is φ = 21728256.

The previous prime is 45431941. The next prime is 45431993. The reversal of 45431992 is 29913454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45431993) 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, 123273 + ... + 123640.

It is an arithmetic number, because the mean of its divisors is an integer number (5555565).

Almost surely, 2^45431992 is an apocalyptic number.

It is an amenable number.

45431992 is a deficient number, since it is larger than the sum of its proper divisors (43457048).

45431992 is a wasteful number, since it uses less digits than its factorization.

45431992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246942 (or 246938 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The square root of 45431992 is about 6740.3258081490. The cubic root of 45431992 is about 356.8238924056.

The spelling of 45431992 in words is "forty-five million, four hundred thirty-one thousand, nine hundred ninety-two".