11998958 has 4 divisors (see below), whose sum is σ = 17998440. Its totient is φ = 5999478.

The previous prime is 11998951. The next prime is 11998967. The reversal of 11998958 is 85989911.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11998951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2999738 + ... + 2999741.

It is an arithmetic number, because the mean of its divisors is an integer number (4499610).

Almost surely, 2^11998958 is an apocalyptic number.

11998958 is a deficient number, since it is larger than the sum of its proper divisors (5999482).

11998958 is an equidigital number, since it uses as much as digits as its factorization.

11998958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5999481.

The product of its digits is 233280, while the sum is 50.

The square root of 11998958 is about 3463.9512121276. The cubic root of 11998958 is about 228.9362216953.

The spelling of 11998958 in words is "eleven million, nine hundred ninety-eight thousand, nine hundred fifty-eight".