999917152 has 96 divisors (see below), whose sum is σ = 2317641984. Its totient is φ = 420249600.

The previous prime is 999917137. The next prime is 999917189. The reversal of 999917152 is 251719999.

It is a happy number.

It is a super-2 number, since 2×999917152² = 1999668621727582208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a self number, because there is not a number n which added to its sum of digits gives 999917152.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216952 + ... + 221512.

It is an arithmetic number, because the mean of its divisors is an integer number (24142104).

Almost surely, 2^999917152 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 999917152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1158820992).

999917152 is an abundant number, since it is smaller than the sum of its proper divisors (1317724832).

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

999917152 is a wasteful number, since it uses less digits than its factorization.

999917152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4632 (or 4624 counting only the distinct ones).

The product of its digits is 459270, while the sum is 52.

The square root of 999917152 is about 31621.4666326532. The cubic root of 999917152 is about 999.9723832373.

The spelling of 999917152 in words is "nine hundred ninety-nine million, nine hundred seventeen thousand, one hundred fifty-two".