50999840 has 24 divisors (see below), whose sum is σ = 120487500. Its totient is φ = 20399872.

The previous prime is 50999831. The next prime is 50999887. The reversal of 50999840 is 4899905.

It can be written as a sum of positive squares in 2 ways, for example, as 45104656 + 5895184 = 6716^2 + 2428^2 .

It is a junction number, because it is equal to n+sod(n) for n = 50999791 and 50999800.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159215 + ... + 159534.

Almost surely, 2^50999840 is an apocalyptic number.

It is an amenable number.

50999840 is an abundant number, since it is smaller than the sum of its proper divisors (69487660).

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

50999840 is a wasteful number, since it uses less digits than its factorization.

50999840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318764 (or 318756 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 50999840 is about 7141.4172262934. The cubic root of 50999840 is about 370.8425891166.

The spelling of 50999840 in words is "fifty million, nine hundred ninety-nine thousand, eight hundred forty".