988589640 has 32 divisors (see below), whose sum is σ = 2965769280. Its totient is φ = 263623872.

The previous prime is 988589639. The next prime is 988589669. The reversal of 988589640 is 46985889.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4119004 + ... + 4119243.

It is an arithmetic number, because the mean of its divisors is an integer number (92680290).

Almost surely, 2^988589640 is an apocalyptic number.

It is an amenable number.

988589640 is an abundant number, since it is smaller than the sum of its proper divisors (1977179640).

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

988589640 is a wasteful number, since it uses less digits than its factorization.

988589640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8238261 (or 8238257 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 57.

The square root of 988589640 is about 31441.8453656906. The cubic root of 988589640 is about 996.1819880031.

The spelling of 988589640 in words is "nine hundred eighty-eight million, five hundred eighty-nine thousand, six hundred forty".