45454990 has 32 divisors (see below), whose sum is σ = 96528384. Its totient is φ = 15081120.

The previous prime is 45454979. The next prime is 45454993. The reversal of 45454990 is 9945454.

It is a super-2 number, since 2×45454990² = 4132312231800200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45454993) 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, 8304 + ... + 12643.

It is an arithmetic number, because the mean of its divisors is an integer number (3016512).

Almost surely, 2^45454990 is an apocalyptic number.

45454990 is an abundant number, since it is smaller than the sum of its proper divisors (51073394).

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

45454990 is a wasteful number, since it uses less digits than its factorization.

45454990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20992.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 45454990 is about 6742.0315929251. The cubic root of 45454990 is about 356.8840911864.

The spelling of 45454990 in words is "forty-five million, four hundred fifty-four thousand, nine hundred ninety".