45561988 has 48 divisors (see below), whose sum is σ = 87381504. Its totient is φ = 20725760.

The previous prime is 45561979. The next prime is 45562003. The reversal of 45561988 is 88916554.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177156 + ... + 177412.

It is an arithmetic number, because the mean of its divisors is an integer number (1820448).

Almost surely, 2^45561988 is an apocalyptic number.

It is an amenable number.

45561988 is a deficient number, since it is larger than the sum of its proper divisors (41819516).

45561988 is a wasteful number, since it uses less digits than its factorization.

45561988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372 (or 370 counting only the distinct ones).

The product of its digits is 345600, while the sum is 46.

The square root of 45561988 is about 6749.9620739675. The cubic root of 45561988 is about 357.1638988288.

The spelling of 45561988 in words is "forty-five million, five hundred sixty-one thousand, nine hundred eighty-eight".