45981072 has 30 divisors (see below), whose sum is σ = 128683542. Its totient is φ = 15326976.

The previous prime is 45981053. The next prime is 45981077. The reversal of 45981072 is 27018954.

It can be written as a sum of positive squares in only one way, i.e., 23853456 + 22127616 = 4884^2 + 4704^2 .

It is a super-2 number, since 2×45981072² = 4228517964538368, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (45981077) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 159513 + ... + 159800.

Almost surely, 2^45981072 is an apocalyptic number.

It is an amenable number.

45981072 is an abundant number, since it is smaller than the sum of its proper divisors (82702470).

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

45981072 is a wasteful number, since it uses less digits than its factorization.

45981072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319327 (or 319318 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 45981072 is about 6780.9344488794. The cubic root of 45981072 is about 358.2556354825.

The spelling of 45981072 in words is "forty-five million, nine hundred eighty-one thousand, seventy-two".