1989218902 has 32 divisors (see below), whose sum is σ = 3324128544. Its totient is φ = 885196800.

The previous prime is 1989218897. The next prime is 1989218921. The reversal of 1989218902 is 2098129891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215502 + ... + 224542.

It is an arithmetic number, because the mean of its divisors is an integer number (103879017).

Almost surely, 2^1989218902 is an apocalyptic number.

1989218902 is a deficient number, since it is larger than the sum of its proper divisors (1334909642).

1989218902 is a wasteful number, since it uses less digits than its factorization.

1989218902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9264.

The product of its (nonzero) digits is 186624, while the sum is 49.

The square root of 1989218902 is about 44600.6603314346. The cubic root of 1989218902 is about 1257.6530810825.

The spelling of 1989218902 in words is "one billion, nine hundred eighty-nine million, two hundred eighteen thousand, nine hundred two".