56397285 has 36 divisors (see below), whose sum is σ = 113719788. Its totient is φ = 25780608.

The previous prime is 56397281. The next prime is 56397293. The reversal of 56397285 is 58279365.

It is a happy number.

56397285 is a `hidden beast` number, since 5 + 639 + 7 + 2 + 8 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9529569 + 46867716 = 3087^2 + 6846^2 .

It is not a de Polignac number, because 56397285 - 2² = 56397281 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 56397285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56397281) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10584 + ... + 14993.

It is an arithmetic number, because the mean of its divisors is an integer number (3158883).

Almost surely, 2^56397285 is an apocalyptic number.

It is an amenable number.

56397285 is an abundant number, since it is smaller than the sum of its proper divisors (57322503).

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

56397285 is a wasteful number, since it uses less digits than its factorization.

56397285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25602 (or 25592 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 56397285 is about 7509.8125808838. The cubic root of 56397285 is about 383.4888421774.

The spelling of 56397285 in words is "fifty-six million, three hundred ninety-seven thousand, two hundred eighty-five".