50091720 has 128 divisors (see below), whose sum is σ = 175392000. Its totient is φ = 11440128.

The previous prime is 50091719. The next prime is 50091737. The reversal of 50091720 is 2719005.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40552 + ... + 41768.

It is an arithmetic number, because the mean of its divisors is an integer number (1370250).

Almost surely, 2^50091720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 50091720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87696000).

50091720 is an abundant number, since it is smaller than the sum of its proper divisors (125300280).

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

50091720 is a wasteful number, since it uses less digits than its factorization.

50091720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252 (or 1234 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 50091720 is about 7077.5504236989. The cubic root of 50091720 is about 368.6282785075.

The spelling of 50091720 in words is "fifty million, ninety-one thousand, seven hundred twenty".