55840857 has 8 divisors (see below), whose sum is σ = 74948160. Its totient is φ = 36980400.

The previous prime is 55840843. The next prime is 55840859. The reversal of 55840857 is 75804855.

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

It is not a de Polignac number, because 55840857 - 2¹² = 55836761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55840859) 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, 61182 + ... + 62087.

It is an arithmetic number, because the mean of its divisors is an integer number (9368520).

Almost surely, 2^55840857 is an apocalyptic number.

It is an amenable number.

55840857 is a deficient number, since it is larger than the sum of its proper divisors (19107303).

55840857 is a wasteful number, since it uses less digits than its factorization.

55840857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123423.

The product of its (nonzero) digits is 224000, while the sum is 42.

The square root of 55840857 is about 7472.6740193856. The cubic root of 55840857 is about 382.2234765028.

The spelling of 55840857 in words is "fifty-five million, eight hundred forty thousand, eight hundred fifty-seven".