998629774 has 16 divisors (see below), whose sum is σ = 1552658688. Its totient is φ = 481394232.

The previous prime is 998629771. The next prime is 998629787. The reversal of 998629774 is 477926899.

It is a super-2 number, since 2×998629774² = 1994522851038582152, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998629771) 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, 72984 + ... + 85579.

It is an arithmetic number, because the mean of its divisors is an integer number (97041168).

Almost surely, 2^998629774 is an apocalyptic number.

998629774 is a gapful number since it is divisible by the number (94) formed by its first and last digit.

998629774 is a deficient number, since it is larger than the sum of its proper divisors (554028914).

998629774 is a wasteful number, since it uses less digits than its factorization.

998629774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158679.

The product of its digits is 13716864, while the sum is 61.

The square root of 998629774 is about 31601.1039997023. The cubic root of 998629774 is about 999.5430492278.

The spelling of 998629774 in words is "nine hundred ninety-eight million, six hundred twenty-nine thousand, seven hundred seventy-four".