998591290 has 16 divisors (see below), whose sum is σ = 1810398240. Its totient is φ = 396562320.

The previous prime is 998591273. The next prime is 998591291. The reversal of 998591290 is 92195899.

It is not an unprimeable number, because it can be changed into a prime (998591291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357816 + ... + 360595.

It is an arithmetic number, because the mean of its divisors is an integer number (113149890).

Almost surely, 2^998591290 is an apocalyptic number.

998591290 is a deficient number, since it is larger than the sum of its proper divisors (811806950).

998591290 is a wasteful number, since it uses less digits than its factorization.

998591290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718557.

The product of its (nonzero) digits is 524880, while the sum is 52.

The square root of 998591290 is about 31600.4950910583. The cubic root of 998591290 is about 999.5302093313.

The spelling of 998591290 in words is "nine hundred ninety-eight million, five hundred ninety-one thousand, two hundred ninety".