45909090 has 24 divisors (see below), whose sum is σ = 119363868. Its totient is φ = 12242400.

The previous prime is 45909089. The next prime is 45909091. The reversal of 45909090 is 9090954.

It is an interprime number because it is at equal distance from previous prime (45909089) and next prime (45909091).

It can be written as a sum of positive squares in 2 ways, for example, as 41486481 + 4422609 = 6441^2 + 2103^2 .

45909090 is a modest number, since divided by 9090 gives 4590 as remainder.

It is not an unprimeable number, because it can be changed into a prime (45909091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 254961 + ... + 255140.

Almost surely, 2^45909090 is an apocalyptic number.

45909090 is an abundant number, since it is smaller than the sum of its proper divisors (73454778).

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

45909090 is a wasteful number, since it uses less digits than its factorization.

45909090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510114 (or 510111 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 45909090 is about 6775.6246944470. The cubic root of 45909090 is about 358.0685916656.

The spelling of 45909090 in words is "forty-five million, nine hundred nine thousand, ninety".