9998572 has 6 divisors (see below), whose sum is σ = 17497508. Its totient is φ = 4999284.

The previous prime is 9998561. The next prime is 9998581. The reversal of 9998572 is 2758999.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1249818 + ... + 1249825.

Almost surely, 2^9998572 is an apocalyptic number.

It is an amenable number.

9998572 is a deficient number, since it is larger than the sum of its proper divisors (7498936).

9998572 is a wasteful number, since it uses less digits than its factorization.

9998572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2499647 (or 2499645 counting only the distinct ones).

The product of its digits is 408240, while the sum is 49.

The square root of 9998572 is about 3162.0518654823. The cubic root of 9998572 is about 215.4332134059.

The spelling of 9998572 in words is "nine million, nine hundred ninety-eight thousand, five hundred seventy-two".