54801978 has 32 divisors (see below), whose sum is σ = 136650240. Its totient is φ = 14234160.

The previous prime is 54801959. The next prime is 54801979. The reversal of 54801978 is 87910845.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (54801979) 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, 58848 + ... + 59771.

It is an arithmetic number, because the mean of its divisors is an integer number (4270320).

Almost surely, 2^54801978 is an apocalyptic number.

54801978 is an abundant number, since it is smaller than the sum of its proper divisors (81848262).

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

54801978 is a wasteful number, since it uses less digits than its factorization.

54801978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118642.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 54801978 is about 7402.8358079860. The cubic root of 54801978 is about 379.8382922297.

The spelling of 54801978 in words is "fifty-four million, eight hundred one thousand, nine hundred seventy-eight".