53535978 has 20 divisors (see below), whose sum is σ = 119960610. Its totient is φ = 17845272.

The previous prime is 53535971. The next prime is 53535983. The reversal of 53535978 is 87953535.

53535978 is a `hidden beast` number, since 5 + 3 + 53 + 597 + 8 = 666.

53535978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 52229529 + 1306449 = 7227^2 + 1143^2 .

It is a super-2 number, since 2×53535978² = 5732201880832968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53535971) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 165073 + ... + 165396.

Almost surely, 2^53535978 is an apocalyptic number.

53535978 is an abundant number, since it is smaller than the sum of its proper divisors (66424632).

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

53535978 is a wasteful number, since it uses less digits than its factorization.

53535978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330483 (or 330474 counting only the distinct ones).

The product of its digits is 567000, while the sum is 45.

The square root of 53535978 is about 7316.8284112722. The cubic root of 53535978 is about 376.8905488498.

The spelling of 53535978 in words is "fifty-three million, five hundred thirty-five thousand, nine hundred seventy-eight".