50766640 has 80 divisors (see below), whose sum is σ = 122331456. Its totient is φ = 19584000.

The previous prime is 50766631. The next prime is 50766643. The reversal of 50766640 is 4666705.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-3 number, since 3×50766640³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 50766596 and 50766605.

It is not an unprimeable number, because it can be changed into a prime (50766643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 492829 + ... + 492931.

Almost surely, 2^50766640 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 50766640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61165728).

50766640 is an abundant number, since it is smaller than the sum of its proper divisors (71564816).

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

50766640 is a wasteful number, since it uses less digits than its factorization.

50766640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 272 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 50766640 is about 7125.0712277141. The cubic root of 50766640 is about 370.2764916532.

The spelling of 50766640 in words is "fifty million, seven hundred sixty-six thousand, six hundred forty".