999405488 has 20 divisors (see below), whose sum is σ = 1947948240. Its totient is φ = 496709184.

The previous prime is 999405487. The next prime is 999405493. The reversal of 999405488 is 884504999.

It is a super-2 number, since 2×999405488² = 1997622658889036288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (999405487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184343 + ... + 189686.

It is an arithmetic number, because the mean of its divisors is an integer number (97397412).

Almost surely, 2^999405488 is an apocalyptic number.

It is an amenable number.

999405488 is a deficient number, since it is larger than the sum of its proper divisors (948542752).

999405488 is a wasteful number, since it uses less digits than its factorization.

999405488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374204 (or 374198 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 56.

The square root of 999405488 is about 31613.3751440747. The cubic root of 999405488 is about 999.8017900487.

The spelling of 999405488 in words is "nine hundred ninety-nine million, four hundred five thousand, four hundred eighty-eight".