1998915058 has 8 divisors (see below), whose sum is σ = 3426711552. Its totient is φ = 856677876.

The previous prime is 1998915049. The next prime is 1998915067. The reversal of 1998915058 is 8505198991.

It is an interprime number because it is at equal distance from previous prime (1998915049) and next prime (1998915067).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1998915058² = 7991322818198286728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71389810 + ... + 71389837.

It is an arithmetic number, because the mean of its divisors is an integer number (428338944).

Almost surely, 2^1998915058 is an apocalyptic number.

1998915058 is a deficient number, since it is larger than the sum of its proper divisors (1427796494).

1998915058 is a wasteful number, since it uses less digits than its factorization.

1998915058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142779656.

The product of its (nonzero) digits is 1166400, while the sum is 55.

The square root of 1998915058 is about 44709.2278841852. The cubic root of 1998915058 is about 1259.6931851426.

The spelling of 1998915058 in words is "one billion, nine hundred ninety-eight million, nine hundred fifteen thousand, fifty-eight".