55857494 has 32 divisors (see below), whose sum is σ = 107294976. Its totient is φ = 21172320.

The previous prime is 55857493. The next prime is 55857523. The reversal of 55857494 is 49475855.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55857491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 797 + ... + 10599.

It is an arithmetic number, because the mean of its divisors is an integer number (3352968).

Almost surely, 2^55857494 is an apocalyptic number.

55857494 is a deficient number, since it is larger than the sum of its proper divisors (51437482).

55857494 is a wasteful number, since it uses less digits than its factorization.

55857494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9860.

The product of its digits is 1008000, while the sum is 47.

The square root of 55857494 is about 7473.7871256813. The cubic root of 55857494 is about 382.2614321079.

The spelling of 55857494 in words is "fifty-five million, eight hundred fifty-seven thousand, four hundred ninety-four".