998197580 has 48 divisors (see below), whose sum is σ = 2118057984. Its totient is φ = 395140800.

The previous prime is 998197579. The next prime is 998197589. The reversal of 998197580 is 85791899.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (998197589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1156229 + ... + 1157091.

It is an arithmetic number, because the mean of its divisors is an integer number (44126208).

Almost surely, 2^998197580 is an apocalyptic number.

It is an amenable number.

998197580 is an abundant number, since it is smaller than the sum of its proper divisors (1119860404).

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

998197580 is a wasteful number, since it uses less digits than its factorization.

998197580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406 (or 1404 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 56.

The square root of 998197580 is about 31594.2649859116. The cubic root of 998197580 is about 999.3988320028.

The spelling of 998197580 in words is "nine hundred ninety-eight million, one hundred ninety-seven thousand, five hundred eighty".