50636640 has 192 divisors, whose sum is σ = 170698752. Its totient is φ = 12595200.

The previous prime is 50636623. The next prime is 50636647. The reversal of 50636640 is 4663605.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 50636598 and 50636607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50636647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 610039 + ... + 610121.

It is an arithmetic number, because the mean of its divisors is an integer number (889056).

Almost surely, 2^50636640 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 50636640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85349376).

50636640 is an abundant number, since it is smaller than the sum of its proper divisors (120062112).

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

50636640 is a wasteful number, since it uses less digits than its factorization.

50636640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 50636640 is about 7115.9426641872. The cubic root of 50636640 is about 369.9601612816.

The spelling of 50636640 in words is "fifty million, six hundred thirty-six thousand, six hundred forty".