51238428 has 24 divisors (see below), whose sum is σ = 121242240. Its totient is φ = 16838640.

The previous prime is 51238417. The next prime is 51238463. The reversal of 51238428 is 82483215.

51238428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51238428² = 5250753007822368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29218 + ... + 30921.

It is an arithmetic number, because the mean of its divisors is an integer number (5051760).

Almost surely, 2^51238428 is an apocalyptic number.

It is an amenable number.

51238428 is an abundant number, since it is smaller than the sum of its proper divisors (70003812).

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

51238428 is a wasteful number, since it uses less digits than its factorization.

51238428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60217 (or 60215 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 51238428 is about 7158.1022624715. The cubic root of 51238428 is about 371.4199829234.

The spelling of 51238428 in words is "fifty-one million, two hundred thirty-eight thousand, four hundred twenty-eight".