51765428 has 24 divisors (see below), whose sum is σ = 106428000. Its totient is φ = 21719520.

The previous prime is 51765409. The next prime is 51765437. The reversal of 51765428 is 82456715.

It is a junction number, because it is equal to n+sod(n) for n = 51765391 and 51765400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44678 + ... + 45821.

It is an arithmetic number, because the mean of its divisors is an integer number (4434500).

Almost surely, 2^51765428 is an apocalyptic number.

It is an amenable number.

51765428 is an abundant number, since it is smaller than the sum of its proper divisors (54662572).

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

51765428 is a wasteful number, since it uses less digits than its factorization.

51765428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90527 (or 90525 counting only the distinct ones).

The product of its digits is 67200, while the sum is 38.

The square root of 51765428 is about 7194.8195251862. The cubic root of 51765428 is about 372.6890243736.

The spelling of 51765428 in words is "fifty-one million, seven hundred sixty-five thousand, four hundred twenty-eight".