49991520 has 48 divisors (see below), whose sum is σ = 157474800. Its totient is φ = 13330944.

The previous prime is 49991483. The next prime is 49991531. The reversal of 49991520 is 2519994.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51595 + ... + 52554.

It is an arithmetic number, because the mean of its divisors is an integer number (3280725).

Almost surely, 2^49991520 is an apocalyptic number.

49991520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

49991520 is an abundant number, since it is smaller than the sum of its proper divisors (107483280).

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

49991520 is a wasteful number, since it uses less digits than its factorization.

49991520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104167 (or 104159 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 49991520 is about 7070.4681598887. The cubic root of 49991520 is about 368.3823216284.

The spelling of 49991520 in words is "forty-nine million, nine hundred ninety-one thousand, five hundred twenty".