45207990 has 32 divisors (see below), whose sum is σ = 120555360. Its totient is φ = 12055392.

The previous prime is 45207989. The next prime is 45207991. The reversal of 45207990 is 9970254.

It is an interprime number because it is at equal distance from previous prime (45207989) and next prime (45207991).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45207991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83449 + ... + 83988.

It is an arithmetic number, because the mean of its divisors is an integer number (3767355).

Almost surely, 2^45207990 is an apocalyptic number.

45207990 is an abundant number, since it is smaller than the sum of its proper divisors (75347370).

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

45207990 is a wasteful number, since it uses less digits than its factorization.

45207990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167453 (or 167447 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 45207990 is about 6723.6887197431. The cubic root of 45207990 is about 356.2364870221.

The spelling of 45207990 in words is "forty-five million, two hundred seven thousand, nine hundred ninety".