45399132 has 36 divisors (see below), whose sum is σ = 120800680. Its totient is φ = 14336352.

The previous prime is 45399131. The next prime is 45399139. The reversal of 45399132 is 23199354.

It is a happy number.

45399132 is a `hidden beast` number, since 4 + 539 + 91 + 32 = 666.

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

It is a super-2 number, since 2×45399132² = 4122162372706848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45399131) 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, 32503 + ... + 33870.

Almost surely, 2^45399132 is an apocalyptic number.

It is an amenable number.

45399132 is an abundant number, since it is smaller than the sum of its proper divisors (75401548).

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

45399132 is a wasteful number, since it uses less digits than its factorization.

45399132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66402 (or 66397 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 45399132 is about 6737.8877996001. The cubic root of 45399132 is about 356.7378439289.

The spelling of 45399132 in words is "forty-five million, three hundred ninety-nine thousand, one hundred thirty-two".