55726857 has 12 divisors (see below), whose sum is σ = 81859440. Its totient is φ = 36521208.

The previous prime is 55726841. The next prime is 55726859. The reversal of 55726857 is 75862755.

It is not a de Polignac number, because 55726857 - 2⁴ = 55726841 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (55726859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51943 + ... + 53004.

It is an arithmetic number, because the mean of its divisors is an integer number (6821620).

Almost surely, 2^55726857 is an apocalyptic number.

It is an amenable number.

55726857 is a deficient number, since it is larger than the sum of its proper divisors (26132583).

55726857 is a wasteful number, since it uses less digits than its factorization.

55726857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105012 (or 105009 counting only the distinct ones).

The product of its digits is 588000, while the sum is 45.

The square root of 55726857 is about 7465.0423307574. The cubic root of 55726857 is about 381.9631941915.

The spelling of 55726857 in words is "fifty-five million, seven hundred twenty-six thousand, eight hundred fifty-seven".