56449987 has 8 divisors (see below), whose sum is σ = 61747200. Its totient is φ = 51180360.

The previous prime is 56449957. The next prime is 56450033. The reversal of 56449987 is 78994465.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56449987 - 2²³ = 48061379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56449937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2487 + ... + 10912.

It is an arithmetic number, because the mean of its divisors is an integer number (7718400).

Almost surely, 2^56449987 is an apocalyptic number.

56449987 is a deficient number, since it is larger than the sum of its proper divisors (5297213).

56449987 is a wasteful number, since it uses less digits than its factorization.

56449987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13793.

The product of its digits is 2177280, while the sum is 52.

The square root of 56449987 is about 7513.3206373747. The cubic root of 56449987 is about 383.6082588997.

The spelling of 56449987 in words is "fifty-six million, four hundred forty-nine thousand, nine hundred eighty-seven".