55399858 has 8 divisors (see below), whose sum is σ = 87473520. Its totient is φ = 26242020.

The previous prime is 55399853. The next prime is 55399891. The reversal of 55399858 is 85899355.

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

It is not an unprimeable number, because it can be changed into a prime (55399853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 728908 + ... + 728983.

It is an arithmetic number, because the mean of its divisors is an integer number (10934190).

Almost surely, 2^55399858 is an apocalyptic number.

55399858 is a deficient number, since it is larger than the sum of its proper divisors (32073662).

55399858 is a wasteful number, since it uses less digits than its factorization.

55399858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457912.

The product of its digits is 1944000, while the sum is 52.

The square root of 55399858 is about 7443.1080873517. The cubic root of 55399858 is about 381.2146222480.

The spelling of 55399858 in words is "fifty-five million, three hundred ninety-nine thousand, eight hundred fifty-eight".