989878662 has 48 divisors (see below), whose sum is σ = 2248213968. Its totient is φ = 314415360.

The previous prime is 989878661. The next prime is 989878693. The reversal of 989878662 is 266878989.

It is a self number, because there is not a number n which added to its sum of digits gives 989878662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989878661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16138 + ... + 47330.

It is an arithmetic number, because the mean of its divisors is an integer number (46837791).

Almost surely, 2^989878662 is an apocalyptic number.

989878662 is an abundant number, since it is smaller than the sum of its proper divisors (1258335306).

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

989878662 is a wasteful number, since it uses less digits than its factorization.

989878662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31285 (or 31282 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 63.

The square root of 989878662 is about 31462.3371986253. The cubic root of 989878662 is about 996.6147738418.

The spelling of 989878662 in words is "nine hundred eighty-nine million, eight hundred seventy-eight thousand, six hundred sixty-two".