999990352 has 20 divisors (see below), whose sum is σ = 1939467136. Its totient is φ = 499482720.

The previous prime is 999990347. The next prime is 999990353. The reversal of 999990352 is 253099999.

It is a junction number, because it is equal to n+sod(n) for n = 999990293 and 999990302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999990353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15678 + ... + 47389.

Almost surely, 2^999990352 is an apocalyptic number.

It is an amenable number.

999990352 is a deficient number, since it is larger than the sum of its proper divisors (939476784).

999990352 is a wasteful number, since it uses less digits than its factorization.

999990352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64066 (or 64060 counting only the distinct ones).

The product of its (nonzero) digits is 1771470, while the sum is 55.

The square root of 999990352 is about 31622.6240530415. The cubic root of 999990352 is about 999.9967839897.

The spelling of 999990352 in words is "nine hundred ninety-nine million, nine hundred ninety thousand, three hundred fifty-two".