56280557 has 8 divisors (see below), whose sum is σ = 60310656. Its totient is φ = 52330432.

The previous prime is 56280547. The next prime is 56280571. The reversal of 56280557 is 75508265.

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

It is a cyclic number.

It is not a de Polignac number, because 56280557 - 2¹⁰ = 56279533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56280557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56280547) 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, 18533 + ... + 21354.

It is an arithmetic number, because the mean of its divisors is an integer number (7538832).

Almost surely, 2^56280557 is an apocalyptic number.

It is an amenable number.

56280557 is a deficient number, since it is larger than the sum of its proper divisors (4030099).

56280557 is a wasteful number, since it uses less digits than its factorization.

56280557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39987.

The product of its (nonzero) digits is 84000, while the sum is 38.

The square root of 56280557 is about 7502.0368567476. The cubic root of 56280557 is about 383.2240847255.

The spelling of 56280557 in words is "fifty-six million, two hundred eighty thousand, five hundred fifty-seven".