55489889 has 8 divisors (see below), whose sum is σ = 68295360. Its totient is φ = 43904016.

The previous prime is 55489883. The next prime is 55489891. The reversal of 55489889 is 98898455.

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

It is a de Polignac number, because none of the positive numbers 2^k-55489889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55489883) 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, 304799 + ... + 304980.

It is an arithmetic number, because the mean of its divisors is an integer number (8536920).

Almost surely, 2^55489889 is an apocalyptic number.

It is an amenable number.

55489889 is a deficient number, since it is larger than the sum of its proper divisors (12805471).

55489889 is a wasteful number, since it uses less digits than its factorization.

55489889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609799.

The product of its digits is 4147200, while the sum is 56.

The square root of 55489889 is about 7449.1535760783. The cubic root of 55489889 is about 381.4210160293.

The spelling of 55489889 in words is "fifty-five million, four hundred eighty-nine thousand, eight hundred eighty-nine".