49171920 has 80 divisors (see below), whose sum is σ = 174215040. Its totient is φ = 11238912.

The previous prime is 49171901. The next prime is 49171931. The reversal of 49171920 is 2917194.

It is a tau number, because it is divible by the number of its divisors (80).

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, 12955 + ... + 16314.

It is an arithmetic number, because the mean of its divisors is an integer number (2177688).

Almost surely, 2^49171920 is an apocalyptic number.

49171920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

49171920 is an abundant number, since it is smaller than the sum of its proper divisors (125043120).

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

49171920 is a wasteful number, since it uses less digits than its factorization.

49171920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29292 (or 29286 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 49171920 is about 7012.2692475403. The cubic root of 49171920 is about 366.3580359764.

The spelling of 49171920 in words is "forty-nine million, one hundred seventy-one thousand, nine hundred twenty".