50881644 has 36 divisors (see below), whose sum is σ = 140311080. Its totient is φ = 15418560.

The previous prime is 50881637. The next prime is 50881669. The reversal of 50881644 is 44618805.

50881644 is a `hidden beast` number, since 5 + 0 + 8 + 8 + 1 + 644 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×50881644² = 5177883392285472, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 50881599 and 50881608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63849 + ... + 64640.

It is an arithmetic number, because the mean of its divisors is an integer number (3897530).

Almost surely, 2^50881644 is an apocalyptic number.

It is an amenable number.

50881644 is an abundant number, since it is smaller than the sum of its proper divisors (89429436).

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

50881644 is a wasteful number, since it uses less digits than its factorization.

50881644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128510 (or 128505 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 50881644 is about 7133.1370377976. The cubic root of 50881644 is about 370.5558822318. Note that the first 3 decimals are identical.

The spelling of 50881644 in words is "fifty million, eight hundred eighty-one thousand, six hundred forty-four".