53402866 has 12 divisors (see below), whose sum is σ = 88048926. Its totient is φ = 24273920.

The previous prime is 53402837. The next prime is 53402873. The reversal of 53402866 is 66820435.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 51912025 + 1490841 = 7205^2 + 1221^2 .

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, 110095 + ... + 110578.

Almost surely, 2^53402866 is an apocalyptic number.

53402866 is a deficient number, since it is larger than the sum of its proper divisors (34646060).

53402866 is a wasteful number, since it uses less digits than its factorization.

53402866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220697 (or 220686 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 53402866 is about 7307.7264590295. The cubic root of 53402866 is about 376.5779223759.

Subtracting 53402866 from its reverse (66820435), we obtain a square (13417569 = 3663²).

The spelling of 53402866 in words is "fifty-three million, four hundred two thousand, eight hundred sixty-six".