969998640 has 160 divisors (see below), whose sum is σ = 3408948480. Its totient is φ = 226188288.

The previous prime is 969998639. The next prime is 969998651. The reversal of 969998640 is 46899969.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51099 + ... + 67461.

It is an arithmetic number, because the mean of its divisors is an integer number (21305928).

Almost surely, 2^969998640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 969998640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1704474240).

969998640 is an abundant number, since it is smaller than the sum of its proper divisors (2438949840).

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

969998640 is a wasteful number, since it uses less digits than its factorization.

969998640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16411 (or 16405 counting only the distinct ones).

The product of its (nonzero) digits is 7558272, while the sum is 60.

The square root of 969998640 is about 31144.8011713031. The cubic root of 969998640 is about 989.8978366160.

The spelling of 969998640 in words is "nine hundred sixty-nine million, nine hundred ninety-eight thousand, six hundred forty".