978555588 has 24 divisors (see below), whose sum is σ = 2289528192. Its totient is φ = 325294944.

The previous prime is 978555587. The next prime is 978555607. The reversal of 978555588 is 885555879.

It is not an unprimeable number, because it can be changed into a prime (978555587) 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, 106695 + ... + 115502.

It is an arithmetic number, because the mean of its divisors is an integer number (95397008).

Almost surely, 2^978555588 is an apocalyptic number.

It is an amenable number.

978555588 is an abundant number, since it is smaller than the sum of its proper divisors (1310972604).

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

978555588 is a wasteful number, since it uses less digits than its factorization.

978555588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222571 (or 222569 counting only the distinct ones).

The product of its digits is 20160000, while the sum is 60.

The square root of 978555588 is about 31281.8731536332. The cubic root of 978555588 is about 992.8001492237.

The spelling of 978555588 in words is "nine hundred seventy-eight million, five hundred fifty-five thousand, five hundred eighty-eight".