57142836 has 18 divisors (see below), whose sum is σ = 144444482. Its totient is φ = 19047600.

The previous prime is 57142793. The next prime is 57142843. The reversal of 57142836 is 63824175.

57142836 is a `hidden beast` number, since 571 + 4 + 2 + 83 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 52707600 + 4435236 = 7260^2 + 2106^2 .

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

It is a super-2 number, since 2×57142836² = 6530607412245792, 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: 1587301 = 57142836 / (5 + 7 + 1 + 4 + 2 + 8 + 3 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 57142836.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 793615 + ... + 793686.

Almost surely, 2^57142836 is an apocalyptic number.

It is an amenable number.

57142836 is an abundant number, since it is smaller than the sum of its proper divisors (87301646).

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

57142836 is a wasteful number, since it uses less digits than its factorization.

57142836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587311 (or 1587306 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 57142836 is about 7559.2880617159. The cubic root of 57142836 is about 385.1713096064.

The spelling of 57142836 in words is "fifty-seven million, one hundred forty-two thousand, eight hundred thirty-six".