51127728 has 80 divisors (see below), whose sum is σ = 136705536. Its totient is φ = 16456960.

The previous prime is 51127709. The next prime is 51127733. The reversal of 51127728 is 82772115.

It is a super-2 number, since 2×51127728² = 5228089140883968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 295450 + ... + 295622.

Almost surely, 2^51127728 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 51127728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68352768).

51127728 is an abundant number, since it is smaller than the sum of its proper divisors (85577808).

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

51127728 is a wasteful number, since it uses less digits than its factorization.

51127728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362 (or 356 counting only the distinct ones).

The product of its digits is 7840, while the sum is 33.

The square root of 51127728 is about 7150.3655850593. The cubic root of 51127728 is about 371.1523072768.

The spelling of 51127728 in words is "fifty-one million, one hundred twenty-seven thousand, seven hundred twenty-eight".