56887540 has 24 divisors (see below), whose sum is σ = 119757960. Its totient is φ = 22699008.

The previous prime is 56887529. The next prime is 56887547. The reversal of 56887540 is 4578865.

It can be written as a sum of positive squares in 4 ways, for example, as 6022116 + 50865424 = 2454^2 + 7132^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56887547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5376 + ... + 11944.

It is an arithmetic number, because the mean of its divisors is an integer number (4989915).

Almost surely, 2^56887540 is an apocalyptic number.

It is an amenable number.

56887540 is an abundant number, since it is smaller than the sum of its proper divisors (62870420).

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

56887540 is a wasteful number, since it uses less digits than its factorization.

56887540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7011 (or 7009 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 43.

The square root of 56887540 is about 7542.3829125814. The cubic root of 56887540 is about 384.5968456500.

The spelling of 56887540 in words is "fifty-six million, eight hundred eighty-seven thousand, five hundred forty".