989215712 has 24 divisors (see below), whose sum is σ = 1980531000. Its totient is φ = 486223744.

The previous prime is 989215699. The next prime is 989215729. The reversal of 989215712 is 217512989.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260087 + ... + 263862.

It is an arithmetic number, because the mean of its divisors is an integer number (82522125).

Almost surely, 2^989215712 is an apocalyptic number.

It is an amenable number.

989215712 is an abundant number, since it is smaller than the sum of its proper divisors (991315288).

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

989215712 is a wasteful number, since it uses less digits than its factorization.

989215712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524018 (or 524010 counting only the distinct ones).

The product of its digits is 90720, while the sum is 44.

The square root of 989215712 is about 31451.7998213139. The cubic root of 989215712 is about 996.3922370325.

The spelling of 989215712 in words is "nine hundred eighty-nine million, two hundred fifteen thousand, seven hundred twelve".