55643898 has 8 divisors (see below), whose sum is σ = 111287808. Its totient is φ = 18547964.

The previous prime is 55643897. The next prime is 55643909. The reversal of 55643898 is 89834655.

It is a happy number.

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

55643898 is an admirable number.

It is a super-3 number, since 3×55643898³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (55643891) 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, 4636986 + ... + 4636997.

It is an arithmetic number, because the mean of its divisors is an integer number (13910976).

Almost surely, 2^55643898 is an apocalyptic number.

55643898 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55643898 is a wasteful number, since it uses less digits than its factorization.

55643898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9273988.

The product of its digits is 1036800, while the sum is 48.

The square root of 55643898 is about 7459.4837622988. The cubic root of 55643898 is about 381.7735607823.

The spelling of 55643898 in words is "fifty-five million, six hundred forty-three thousand, eight hundred ninety-eight".