54257720 has 64 divisors (see below), whose sum is σ = 133941600. Its totient is φ = 19617280.

The previous prime is 54257683. The next prime is 54257729. The reversal of 54257720 is 2775245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54257729) 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, 139286 + ... + 139674.

Almost surely, 2^54257720 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 54257720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66970800).

54257720 is an abundant number, since it is smaller than the sum of its proper divisors (79683880).

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

54257720 is a wasteful number, since it uses less digits than its factorization.

54257720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 32.

The square root of 54257720 is about 7365.9839804333. The cubic root of 54257720 is about 378.5766698828.

The spelling of 54257720 in words is "fifty-four million, two hundred fifty-seven thousand, seven hundred twenty".