54878840 has 64 divisors (see below), whose sum is σ = 131068800. Its totient is φ = 20621952.

The previous prime is 54878819. The next prime is 54878843. The reversal of 54878840 is 4887845.

It is a junction number, because it is equal to n+sod(n) for n = 54878791 and 54878800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54878843) 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, 123659 + ... + 124101.

It is an arithmetic number, because the mean of its divisors is an integer number (2047950).

Almost surely, 2^54878840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 54878840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65534400).

54878840 is an abundant number, since it is smaller than the sum of its proper divisors (76189960).

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

54878840 is a wasteful number, since it uses less digits than its factorization.

54878840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636 (or 632 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 44.

The square root of 54878840 is about 7408.0253779263. The cubic root of 54878840 is about 380.0157888177.

The spelling of 54878840 in words is "fifty-four million, eight hundred seventy-eight thousand, eight hundred forty".