53178690 has 16 divisors (see below), whose sum is σ = 127628928. Its totient is φ = 14180976.

The previous prime is 53178683. The next prime is 53178707. The reversal of 53178690 is 9687135.

It is a super-2 number, since 2×53178690² = 5655946140232200, which contains 22 as substring.

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, 886282 + ... + 886341.

It is an arithmetic number, because the mean of its divisors is an integer number (7976808).

Almost surely, 2^53178690 is an apocalyptic number.

53178690 is an abundant number, since it is smaller than the sum of its proper divisors (74450238).

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

53178690 is a wasteful number, since it uses less digits than its factorization.

53178690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1772633.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 53178690 is about 7292.3720420725. The cubic root of 53178690 is about 376.0502469819.

The spelling of 53178690 in words is "fifty-three million, one hundred seventy-eight thousand, six hundred ninety".