7989459136 has 56 divisors (see below), whose sum is σ = 16590050640. Its totient is φ = 3813368832.

The previous prime is 7989459109. The next prime is 7989459151. The reversal of 7989459136 is 6319549897.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93675 + ... + 157333.

Almost surely, 2^7989459136 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 7989459136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8295025320).

7989459136 is an abundant number, since it is smaller than the sum of its proper divisors (8600591504).

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

7989459136 is a wasteful number, since it uses less digits than its factorization.

7989459136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63761 (or 63751 counting only the distinct ones).

The product of its digits is 14696640, while the sum is 61.

The square root of 7989459136 is about 89383.7744559940. The cubic root of 7989459136 is about 1999.1212085860.

The spelling of 7989459136 in words is "seven billion, nine hundred eighty-nine million, four hundred fifty-nine thousand, one hundred thirty-six".