54686440 has 16 divisors (see below), whose sum is σ = 123044580. Its totient is φ = 21874560.

The previous prime is 54686413. The next prime is 54686441. The reversal of 54686440 is 4468645.

It can be written as a sum of positive squares in 2 ways, for example, as 53260804 + 1425636 = 7298^2 + 1194^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 54686440.

It is not an unprimeable number, because it can be changed into a prime (54686441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 683541 + ... + 683620.

Almost surely, 2^54686440 is an apocalyptic number.

It is an amenable number.

54686440 is an abundant number, since it is smaller than the sum of its proper divisors (68358140).

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

54686440 is a wasteful number, since it uses less digits than its factorization.

54686440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367172 (or 1367168 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 37.

The square root of 54686440 is about 7395.0280594464. The cubic root of 54686440 is about 379.5711690615.

The spelling of 54686440 in words is "fifty-four million, six hundred eighty-six thousand, four hundred forty".