45505590 has 32 divisors (see below), whose sum is σ = 117615456. Its totient is φ = 11201280.

The previous prime is 45505571. The next prime is 45505591. The reversal of 45505590 is 9550554.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45505591) 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, 57951 + ... + 58730.

It is an arithmetic number, because the mean of its divisors is an integer number (3675483).

Almost surely, 2^45505590 is an apocalyptic number.

45505590 is an abundant number, since it is smaller than the sum of its proper divisors (72109866).

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

45505590 is a wasteful number, since it uses less digits than its factorization.

45505590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116704.

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 45505590 is about 6745.7831272581. The cubic root of 45505590 is about 357.0164685731.

The spelling of 45505590 in words is "forty-five million, five hundred five thousand, five hundred ninety".