45400090 has 8 divisors (see below), whose sum is σ = 81720180. Its totient is φ = 18160032.

The previous prime is 45400039. The next prime is 45400093. The reversal of 45400090 is 9000454.

It can be written as a sum of positive squares in 2 ways, for example, as 36832761 + 8567329 = 6069^2 + 2927^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×45400090² = 4122336344016200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45400093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2269995 + ... + 2270014.

Almost surely, 2^45400090 is an apocalyptic number.

45400090 is a deficient number, since it is larger than the sum of its proper divisors (36320090).

45400090 is a wasteful number, since it uses less digits than its factorization.

45400090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4540016.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 45400090 is about 6737.9588897529. The cubic root of 45400090 is about 356.7403531725.

The spelling of 45400090 in words is "forty-five million, four hundred thousand, ninety".