50979840 has 88 divisors (see below), whose sum is σ = 163104960. Its totient is φ = 13590528.

The previous prime is 50979839. The next prime is 50979847. The reversal of 50979840 is 4897905.

It is a junction number, because it is equal to n+sod(n) for n = 50979792 and 50979801.

It is not an unprimeable number, because it can be changed into a prime (50979847) 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, 13701 + ... + 17019.

Almost surely, 2^50979840 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 50979840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81552480).

50979840 is an abundant number, since it is smaller than the sum of its proper divisors (112125120).

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

50979840 is a wasteful number, since it uses less digits than its factorization.

50979840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3347 (or 3329 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 50979840 is about 7140.0168067029. The cubic root of 50979840 is about 370.7941064709.

The spelling of 50979840 in words is "fifty million, nine hundred seventy-nine thousand, eight hundred forty".