56619540 has 48 divisors (see below), whose sum is σ = 176151360. Its totient is φ = 15098400.

The previous prime is 56619539. The next prime is 56619551. The reversal of 56619540 is 4591665.

56619540 is a `hidden beast` number, since 56 + 61 + 9 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 56619495 and 56619504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51886 + ... + 52965.

It is an arithmetic number, because the mean of its divisors is an integer number (3669820).

Almost surely, 2^56619540 is an apocalyptic number.

It is an amenable number.

56619540 is an abundant number, since it is smaller than the sum of its proper divisors (119531820).

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

56619540 is a wasteful number, since it uses less digits than its factorization.

56619540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104869 (or 104861 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 56619540 is about 7524.5956702005. The cubic root of 56619540 is about 383.9919431903.

The spelling of 56619540 in words is "fifty-six million, six hundred nineteen thousand, five hundred forty".