998292638 has 16 divisors (see below), whose sum is σ = 1711826784. Its totient is φ = 427722720.

The previous prime is 998292637. The next prime is 998292677. The reversal of 998292638 is 836292899.

It is a super-3 number, since 3×998292638³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998292637) 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, 60968 + ... + 75588.

It is an arithmetic number, because the mean of its divisors is an integer number (106989174).

Almost surely, 2^998292638 is an apocalyptic number.

998292638 is a deficient number, since it is larger than the sum of its proper divisors (713534146).

998292638 is a wasteful number, since it uses less digits than its factorization.

998292638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19507.

The product of its digits is 3359232, while the sum is 56.

The square root of 998292638 is about 31595.7693053991. The cubic root of 998292638 is about 999.4305551274.

The spelling of 998292638 in words is "nine hundred ninety-eight million, two hundred ninety-two thousand, six hundred thirty-eight".