998191436 has 36 divisors (see below), whose sum is σ = 1925834904. Its totient is φ = 452675520.

The previous prime is 998191427. The next prime is 998191457. The reversal of 998191436 is 634191899.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a super-2 number, since 2×998191436² = 1992772285807484192, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2305076 + ... + 2305508.

It is an arithmetic number, because the mean of its divisors is an integer number (53495414).

Almost surely, 2^998191436 is an apocalyptic number.

It is an amenable number.

998191436 is a deficient number, since it is larger than the sum of its proper divisors (927643468).

998191436 is an equidigital number, since it uses as much as digits as its factorization.

998191436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903 (or 446 counting only the distinct ones).

The product of its digits is 419904, while the sum is 50.

The square root of 998191436 is about 31594.1677529255. The cubic root of 998191436 is about 999.3967815340.

The spelling of 998191436 in words is "nine hundred ninety-eight million, one hundred ninety-one thousand, four hundred thirty-six".