999402632 has 12 divisors (see below), whose sum is σ = 1874047605.
Its totient is φ = 499656608.
The previous prime is 999402629. The next prime is 999402637. The reversal of 999402632 is 236204999.
Multipling 999402632 by its product of nonzero digits (209952), we get a square (209826581393664 = 144853922).
It is a powerful number, because all its prime factors have an exponent greater than 1
and also an Achilles number because it is not a perfect power.
It can be written as a sum of positive squares in 2 ways, for example, as 830246596 + 169156036 = 28814^2 + 13006^2
It is an ABA number since it can be written as A⋅BA, here for A=2, B=22354.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (999402637) by changing a digit.
It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 83828 + ... + 95004.
Almost surely, 2999402632 is an apocalyptic number.
It is an amenable number.
999402632 is a deficient number, since it is larger than the sum of its proper divisors (874644973).
999402632 is an frugal number, since it uses more digits than its factorization.
999402632 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 22360 (or 11179 counting only the distinct ones).
The product of its (nonzero) digits is 209952, while the sum is 44.
The square root of 999402632 is about 31613.3299732882.
The cubic root of 999402632 is about 999.8008376703.
The spelling of 999402632 in words is "nine hundred ninety-nine million, four hundred two thousand, six hundred thirty-two".