54286640 has 60 divisors (see below), whose sum is σ = 129572064. Its totient is φ = 21151872.

The previous prime is 54286613. The next prime is 54286643. The reversal of 54286640 is 4668245.

It is a self number, because there is not a number n which added to its sum of digits gives 54286640.

It is not an unprimeable number, because it can be changed into a prime (54286643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147737 + ... + 148103.

Almost surely, 2^54286640 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 54286640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64786032).

54286640 is an abundant number, since it is smaller than the sum of its proper divisors (75285424).

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

54286640 is a wasteful number, since it uses less digits than its factorization.

54286640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466 (or 417 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 54286640 is about 7367.9467967677. The cubic root of 54286640 is about 378.6439198684.

The spelling of 54286640 in words is "fifty-four million, two hundred eighty-six thousand, six hundred forty".