998165628 has 72 divisors (see below), whose sum is σ = 2560049856. Its totient is φ = 327888000.

The previous prime is 998165593. The next prime is 998165633. The reversal of 998165628 is 826561899.

It is a happy number.

998165628 is a `hidden beast` number, since 9 + 9 + 8 + 1 + 6 + 5 + 628 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 984850 + ... + 985862.

It is an arithmetic number, because the mean of its divisors is an integer number (35556248).

Almost surely, 2^998165628 is an apocalyptic number.

It is an amenable number.

998165628 is an abundant number, since it is smaller than the sum of its proper divisors (1561884228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

998165628 is a wasteful number, since it uses less digits than its factorization.

998165628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395 (or 1390 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 998165628 is about 31593.7593204734. The cubic root of 998165628 is about 999.3881684051.

The spelling of 998165628 in words is "nine hundred ninety-eight million, one hundred sixty-five thousand, six hundred twenty-eight".