989618652 has 72 divisors (see below), whose sum is σ = 2787063552. Its totient is φ = 293498400.

The previous prime is 989618639. The next prime is 989618653. The reversal of 989618652 is 256816989.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989618653) 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, 7974 + ... + 45197.

It is an arithmetic number, because the mean of its divisors is an integer number (38709216).

Almost surely, 2^989618652 is an apocalyptic number.

It is an amenable number.

989618652 is an abundant number, since it is smaller than the sum of its proper divisors (1797444900).

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

989618652 is a wasteful number, since it uses less digits than its factorization.

989618652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53239 (or 53234 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 989618652 is about 31458.2048438877. The cubic root of 989618652 is about 996.5275064123.

The spelling of 989618652 in words is "nine hundred eighty-nine million, six hundred eighteen thousand, six hundred fifty-two".