55489806 has 32 divisors (see below), whose sum is σ = 123678720. Its totient is φ = 18441432.

The previous prime is 55489801. The next prime is 55489813. The reversal of 55489806 is 60898455.

55489806 is a `hidden beast` number, since 554 + 8 + 98 + 0 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55489801) 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, 19341 + ... + 22023.

It is an arithmetic number, because the mean of its divisors is an integer number (3864960).

Almost surely, 2^55489806 is an apocalyptic number.

55489806 is an abundant number, since it is smaller than the sum of its proper divisors (68188914).

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

55489806 is a wasteful number, since it uses less digits than its factorization.

55489806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3077 (or 3071 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The square root of 55489806 is about 7449.1480049735. The cubic root of 55489806 is about 381.4208258567.

The spelling of 55489806 in words is "fifty-five million, four hundred eighty-nine thousand, eight hundred six".