49998990 has 32 divisors (see below), whose sum is σ = 120185856. Its totient is φ = 13312160.

The previous prime is 49998983. The next prime is 49999031. The reversal of 49998990 is 9989994.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 49998990.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32335 + ... + 33845.

It is an arithmetic number, because the mean of its divisors is an integer number (3755808).

Almost surely, 2^49998990 is an apocalyptic number.

49998990 is an abundant number, since it is smaller than the sum of its proper divisors (70186866).

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

49998990 is a wasteful number, since it uses less digits than its factorization.

49998990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2624.

The product of its (nonzero) digits is 1889568, while the sum is 57.

The square root of 49998990 is about 7070.9963937199. The cubic root of 49998990 is about 368.4006692661.

The spelling of 49998990 in words is "forty-nine million, nine hundred ninety-eight thousand, nine hundred ninety".