54681440 has 48 divisors (see below), whose sum is σ = 140933520. Its totient is φ = 19883520.

The previous prime is 54681433. The next prime is 54681461. The reversal of 54681440 is 4418645.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 54681397 and 54681406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13775 + ... + 17294.

It is an arithmetic number, because the mean of its divisors is an integer number (2936115).

Almost surely, 2^54681440 is an apocalyptic number.

It is an amenable number.

54681440 is an abundant number, since it is smaller than the sum of its proper divisors (86252080).

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

54681440 is a wasteful number, since it uses less digits than its factorization.

54681440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31095 (or 31087 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 54681440 is about 7394.6899867405. The cubic root of 54681440 is about 379.5596006015.

The spelling of 54681440 in words is "fifty-four million, six hundred eighty-one thousand, four hundred forty".