51862428 has 18 divisors (see below), whose sum is σ = 131096784. Its totient is φ = 17287464.

The previous prime is 51862423. The next prime is 51862439. The reversal of 51862428 is 82426815.

51862428 is a `hidden beast` number, since 5 + 1 + 8 + 624 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×51862428² = 5379422876110368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1440623 = 51862428 / (5 + 1 + 8 + 6 + 2 + 4 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 51862392 and 51862401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51862423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 720276 + ... + 720347.

Almost surely, 2^51862428 is an apocalyptic number.

It is an amenable number.

51862428 is an abundant number, since it is smaller than the sum of its proper divisors (79234356).

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

51862428 is a wasteful number, since it uses less digits than its factorization.

51862428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440633 (or 1440628 counting only the distinct ones).

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

The square root of 51862428 is about 7201.5573315777. The cubic root of 51862428 is about 372.9216653464.

The spelling of 51862428 in words is "fifty-one million, eight hundred sixty-two thousand, four hundred twenty-eight".