50642640 has 120 divisors (see below), whose sum is σ = 174763368. Its totient is φ = 13132800.

The previous prime is 50642639. The next prime is 50642653. The reversal of 50642640 is 4624605.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4511376 + 46131264 = 2124^2 + 6792^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25690 + ... + 27590.

Almost surely, 2^50642640 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 50642640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87381684).

50642640 is an abundant number, since it is smaller than the sum of its proper divisors (124120728).

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

50642640 is a wasteful number, since it uses less digits than its factorization.

50642640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1957 (or 1948 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 50642640 is about 7116.3642402564. The cubic root of 50642640 is about 369.9747730548.

The spelling of 50642640 in words is "fifty million, six hundred forty-two thousand, six hundred forty".