998406956 has 12 divisors (see below), whose sum is σ = 1803574080. Its totient is φ = 483100080.

The previous prime is 998406919. The next prime is 998406971. The reversal of 998406956 is 659604899.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4025711 + ... + 4025958.

It is an arithmetic number, because the mean of its divisors is an integer number (150297840).

Almost surely, 2^998406956 is an apocalyptic number.

It is an amenable number.

998406956 is a deficient number, since it is larger than the sum of its proper divisors (805167124).

998406956 is a wasteful number, since it uses less digits than its factorization.

998406956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8051704 (or 8051702 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 56.

The square root of 998406956 is about 31597.5783249286. The cubic root of 998406956 is about 999.4687031069.

The spelling of 998406956 in words is "nine hundred ninety-eight million, four hundred six thousand, nine hundred fifty-six".