56278287 has 32 divisors (see below), whose sum is σ = 90316800. Its totient is φ = 34429536.

The previous prime is 56278283. The next prime is 56278289. The reversal of 56278287 is 78287265.

56278287 is a `hidden beast` number, since 562 + 7 + 8 + 2 + 87 = 666.

It is not a de Polignac number, because 56278287 - 2² = 56278283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56278283) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77914 + ... + 78632.

It is an arithmetic number, because the mean of its divisors is an integer number (2822400).

Almost surely, 2^56278287 is an apocalyptic number.

56278287 is a deficient number, since it is larger than the sum of its proper divisors (34038513).

56278287 is a wasteful number, since it uses less digits than its factorization.

56278287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964 (or 958 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 56278287 is about 7501.8855629768. The cubic root of 56278287 is about 383.2189323815.

It can be divided in two parts, 56278 and 287, that added together give a palindrome (56565).

The spelling of 56278287 in words is "fifty-six million, two hundred seventy-eight thousand, two hundred eighty-seven".