45531988 has 6 divisors (see below), whose sum is σ = 79680986. Its totient is φ = 22765992.

The previous prime is 45531979. The next prime is 45531991. The reversal of 45531988 is 88913554.

45531988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 44063044 + 1468944 = 6638^2 + 1212^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5691495 + ... + 5691502.

Almost surely, 2^45531988 is an apocalyptic number.

It is an amenable number.

45531988 is a deficient number, since it is larger than the sum of its proper divisors (34148998).

45531988 is a wasteful number, since it uses less digits than its factorization.

45531988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11383001 (or 11382999 counting only the distinct ones).

The product of its digits is 172800, while the sum is 43.

The square root of 45531988 is about 6747.7394733348. The cubic root of 45531988 is about 357.0854908546.

The spelling of 45531988 in words is "forty-five million, five hundred thirty-one thousand, nine hundred eighty-eight".