45397990 has 48 divisors (see below), whose sum is σ = 95147136. Its totient is φ = 15530240.

The previous prime is 45397987. The next prime is 45398027. The reversal of 45397990 is 9979354.

It is a self number, because there is not a number n which added to its sum of digits gives 45397990.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19467 + ... + 21673.

It is an arithmetic number, because the mean of its divisors is an integer number (1982232).

Almost surely, 2^45397990 is an apocalyptic number.

45397990 is an abundant number, since it is smaller than the sum of its proper divisors (49749146).

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

45397990 is a wasteful number, since it uses less digits than its factorization.

45397990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2253 (or 2242 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 46.

The square root of 45397990 is about 6737.8030544088. The cubic root of 45397990 is about 356.7348526967.

The spelling of 45397990 in words is "forty-five million, three hundred ninety-seven thousand, nine hundred ninety".