55489830 has 32 divisors (see below), whose sum is σ = 145283328. Its totient is φ = 13452000.

The previous prime is 55489817. The next prime is 55489831. The reversal of 55489830 is 3898455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55489831) 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, 83746 + ... + 84405.

It is an arithmetic number, because the mean of its divisors is an integer number (4540104).

Almost surely, 2^55489830 is an apocalyptic number.

55489830 is an abundant number, since it is smaller than the sum of its proper divisors (89793498).

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

55489830 is a wasteful number, since it uses less digits than its factorization.

55489830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168172.

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 55489830 is about 7449.1496158958. The cubic root of 55489830 is about 381.4208808464.

The spelling of 55489830 in words is "fifty-five million, four hundred eighty-nine thousand, eight hundred thirty".