998549156 has 24 divisors (see below), whose sum is σ = 1924837824. Its totient is φ = 449477280.

The previous prime is 998549147. The next prime is 998549171. The reversal of 998549156 is 651945899.

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, 105635 + ... + 114698.

It is an arithmetic number, because the mean of its divisors is an integer number (80201576).

Almost surely, 2^998549156 is an apocalyptic number.

It is an amenable number.

998549156 is a deficient number, since it is larger than the sum of its proper divisors (926288668).

998549156 is a wasteful number, since it uses less digits than its factorization.

998549156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220451 (or 220449 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 56.

The square root of 998549156 is about 31599.8284172557. The cubic root of 998549156 is about 999.5161512615.

The spelling of 998549156 in words is "nine hundred ninety-eight million, five hundred forty-nine thousand, one hundred fifty-six".