49991620 has 24 divisors (see below), whose sum is σ = 119980224. Its totient is φ = 17139936.

The previous prime is 49991609. The next prime is 49991629. The reversal of 49991620 is 2619994.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (49991629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178402 + ... + 178681.

It is an arithmetic number, because the mean of its divisors is an integer number (4999176).

Almost surely, 2^49991620 is an apocalyptic number.

It is an amenable number.

49991620 is an abundant number, since it is smaller than the sum of its proper divisors (69988604).

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

49991620 is a wasteful number, since it uses less digits than its factorization.

49991620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357099 (or 357097 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 49991620 is about 7070.4752315527. The cubic root of 49991620 is about 368.3825672581.

The spelling of 49991620 in words is "forty-nine million, nine hundred ninety-one thousand, six hundred twenty".