49999980 has 48 divisors (see below), whose sum is σ = 140765184. Its totient is φ = 13260480.

The previous prime is 49999921. The next prime is 49999991. The reversal of 49999980 is 8999994.

It is a self number, because there is not a number n which added to its sum of digits gives 49999980.

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, 9279 + ... + 13641.

It is an arithmetic number, because the mean of its divisors is an integer number (2932608).

Almost surely, 2^49999980 is an apocalyptic number.

It is an amenable number.

49999980 is an abundant number, since it is smaller than the sum of its proper divisors (90765204).

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

49999980 is a wasteful number, since it uses less digits than its factorization.

49999980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4566 (or 4564 counting only the distinct ones).

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

The square root of 49999980 is about 7071.0663976518. The cubic root of 49999980 is about 368.4031007436.

The spelling of 49999980 in words is "forty-nine million, nine hundred ninety-nine thousand, nine hundred eighty".