998978408 has 32 divisors (see below), whose sum is σ = 1926408000. Its totient is φ = 485388288.

The previous prime is 998978369. The next prime is 998978417. The reversal of 998978408 is 804879899.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61160 + ... + 75752.

It is an arithmetic number, because the mean of its divisors is an integer number (60200250).

Almost surely, 2^998978408 is an apocalyptic number.

It is an amenable number.

998978408 is a deficient number, since it is larger than the sum of its proper divisors (927429592).

998978408 is a wasteful number, since it uses less digits than its factorization.

998978408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14841 (or 14837 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 62.

The square root of 998978408 is about 31606.6196863885. The cubic root of 998978408 is about 999.6593533063.

The spelling of 998978408 in words is "nine hundred ninety-eight million, nine hundred seventy-eight thousand, four hundred eight".