999156452 has 36 divisors (see below), whose sum is σ = 2047707900. Its totient is φ = 425323584.

The previous prime is 999156449. The next prime is 999156467. The reversal of 999156452 is 254651999.

It can be written as a sum of positive squares in 2 ways, for example, as 494884516 + 504271936 = 22246^2 + 22456^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 999156452.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12098 + ... + 46310.

It is an arithmetic number, because the mean of its divisors is an integer number (56880775).

Almost surely, 2^999156452 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 999156452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1023853950).

999156452 is an abundant number, since it is smaller than the sum of its proper divisors (1048551448).

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

999156452 is a wasteful number, since it uses less digits than its factorization.

999156452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34380 (or 34371 counting only the distinct ones).

The product of its digits is 874800, while the sum is 50.

The square root of 999156452 is about 31609.4361227783. The cubic root of 999156452 is about 999.7187382326.

The spelling of 999156452 in words is "nine hundred ninety-nine million, one hundred fifty-six thousand, four hundred fifty-two".