988989890 has 16 divisors (see below), whose sum is σ = 2034493632. Its totient is φ = 339082224.

The previous prime is 988989803. The next prime is 988989901. The reversal of 988989890 is 98989889.

It is a self number, because there is not a number n which added to its sum of digits gives 988989890.

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, 7064144 + ... + 7064283.

It is an arithmetic number, because the mean of its divisors is an integer number (127155852).

Almost surely, 2^988989890 is an apocalyptic number.

988989890 is an abundant number, since it is smaller than the sum of its proper divisors (1045503742).

988989890 is a wasteful number, since it uses less digits than its factorization.

988989890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14128441.

The product of its (nonzero) digits is 26873856, while the sum is 68.

The square root of 988989890 is about 31448.2096469735. The cubic root of 988989890 is about 996.3164111673.

The spelling of 988989890 in words is "nine hundred eighty-eight million, nine hundred eighty-nine thousand, eight hundred ninety".