50749920 has 144 divisors (see below), whose sum is σ = 186574752. Its totient is φ = 12487680.

The previous prime is 50749889. The next prime is 50749921. The reversal of 50749920 is 2994705.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50749921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17365 + ... + 20075.

It is an arithmetic number, because the mean of its divisors is an integer number (1295658).

Almost surely, 2^50749920 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 50749920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93287376).

50749920 is an abundant number, since it is smaller than the sum of its proper divisors (135824832).

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

50749920 is a wasteful number, since it uses less digits than its factorization.

50749920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2745 (or 2734 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 50749920 is about 7123.8978094860. The cubic root of 50749920 is about 370.2358369849.

The spelling of 50749920 in words is "fifty million, seven hundred forty-nine thousand, nine hundred twenty".