53967978 has 32 divisors (see below), whose sum is σ = 123174720. Its totient is φ = 17502480.

The previous prime is 53967973. The next prime is 53967989. The reversal of 53967978 is 87976935.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (53967973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11508 + ... + 15503.

It is an arithmetic number, because the mean of its divisors is an integer number (3849210).

Almost surely, 2^53967978 is an apocalyptic number.

53967978 is an abundant number, since it is smaller than the sum of its proper divisors (69206742).

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

53967978 is a wasteful number, since it uses less digits than its factorization.

53967978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27059 (or 27053 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 54.

The square root of 53967978 is about 7346.2900841173. The cubic root of 53967978 is about 377.9015868770.

It can be divided in two parts, 53967 and 978, that added together give a palindrome (54945).

The spelling of 53967978 in words is "fifty-three million, nine hundred sixty-seven thousand, nine hundred seventy-eight".