989936670 has 128 divisors (see below), whose sum is σ = 2584120320. Its totient is φ = 241920000.

The previous prime is 989936641. The next prime is 989936687. The reversal of 989936670 is 76639989.

It is a super-2 number, since 2×989936670² = 1959949221221377800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a self number, because there is not a number n which added to its sum of digits gives 989936670.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2468470 + ... + 2468870.

It is an arithmetic number, because the mean of its divisors is an integer number (20188440).

Almost surely, 2^989936670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 989936670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1292060160).

989936670 is an abundant number, since it is smaller than the sum of its proper divisors (1594183650).

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

989936670 is a wasteful number, since it uses less digits than its factorization.

989936670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562.

The product of its (nonzero) digits is 4408992, while the sum is 57.

The square root of 989936670 is about 31463.2590492466. The cubic root of 989936670 is about 996.6342410428.

The spelling of 989936670 in words is "nine hundred eighty-nine million, nine hundred thirty-six thousand, six hundred seventy".