45216990 has 96 divisors (see below), whose sum is σ = 144720576. Its totient is φ = 9538560.

The previous prime is 45216949. The next prime is 45217013. The reversal of 45216990 is 9961254.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5430 + ... + 10950.

It is an arithmetic number, because the mean of its divisors is an integer number (1507506).

Almost surely, 2^45216990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45216990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72360288).

45216990 is an abundant number, since it is smaller than the sum of its proper divisors (99503586).

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

45216990 is a wasteful number, since it uses less digits than its factorization.

45216990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5554 (or 5551 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 45216990 is about 6724.3579619173. The cubic root of 45216990 is about 356.2601252893.

It can be divided in two parts, 4521 and 6990, that added together give a palindrome (11511).

The spelling of 45216990 in words is "forty-five million, two hundred sixteen thousand, nine hundred ninety".