998591562 has 12 divisors (see below), whose sum is σ = 2163615090. Its totient is φ = 332863848.

The previous prime is 998591549. The next prime is 998591567. The reversal of 998591562 is 265195899.

It can be written as a sum of positive squares in only one way, i.e., 529046001 + 469545561 = 23001^2 + 21669^2 .

It is a junction number, because it is equal to n+sod(n) for n = 998591499 and 998591508.

It is not an unprimeable number, because it can be changed into a prime (998591567) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27738637 + ... + 27738672.

Almost surely, 2^998591562 is an apocalyptic number.

998591562 is an abundant number, since it is smaller than the sum of its proper divisors (1165023528).

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

998591562 is a wasteful number, since it uses less digits than its factorization.

998591562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55477317 (or 55477314 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 54.

The square root of 998591562 is about 31600.4993947881. The cubic root of 998591562 is about 999.5303000832.

The spelling of 998591562 in words is "nine hundred ninety-eight million, five hundred ninety-one thousand, five hundred sixty-two".