9999998732 has 48 divisors (see below), whose sum is σ = 18382651392. Its totient is φ = 4755179520.

The previous prime is 9999998731. The next prime is 9999998783. The reversal of 9999998732 is 2378999999.

It is a Harshad number since it is a multiple of its sum of digits (74).

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 9999998732.

It is not an unprimeable number, because it can be changed into a prime (9999998731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1216757 + ... + 1224947.

It is an arithmetic number, because the mean of its divisors is an integer number (382971904).

Almost surely, 2^9999998732 is an apocalyptic number.

It is an amenable number.

9999998732 is a deficient number, since it is larger than the sum of its proper divisors (8382652660).

9999998732 is a wasteful number, since it uses less digits than its factorization.

9999998732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8418 (or 8416 counting only the distinct ones).

The product of its digits is 178564176, while the sum is 74.

The square root of 9999998732 is about 99999.9936599998. The cubic root of 9999998732 is about 2154.4345989711.

The spelling of 9999998732 in words is "nine billion, nine hundred ninety-nine million, nine hundred ninety-eight thousand, seven hundred thirty-two".