45139290 has 48 divisors (see below), whose sum is σ = 126025632. Its totient is φ = 10317216.

The previous prime is 45139273. The next prime is 45139309. The reversal of 45139290 is 9293154.

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, 13884 + ... + 16823.

It is an arithmetic number, because the mean of its divisors is an integer number (2625534).

Almost surely, 2^45139290 is an apocalyptic number.

45139290 is an abundant number, since it is smaller than the sum of its proper divisors (80886342).

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

45139290 is a wasteful number, since it uses less digits than its factorization.

45139290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30731 (or 30724 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 45139290 is about 6718.5779745419. The cubic root of 45139290 is about 356.0559447912.

The spelling of 45139290 in words is "forty-five million, one hundred thirty-nine thousand, two hundred ninety".