11989938 has 16 divisors (see below), whose sum is σ = 24120576. Its totient is φ = 3973200.

The previous prime is 11989927. The next prime is 11989951. The reversal of 11989938 is 83998911.

It is a super-2 number, since 2×11989938² = 287517226487688, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4738 + ... + 6813.

It is an arithmetic number, because the mean of its divisors is an integer number (1507536).

Almost surely, 2^11989938 is an apocalyptic number.

11989938 is an abundant number, since it is smaller than the sum of its proper divisors (12130638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11989938 is a wasteful number, since it uses less digits than its factorization.

11989938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11729.

The product of its digits is 139968, while the sum is 48.

The square root of 11989938 is about 3462.6489859644. The cubic root of 11989938 is about 228.8788410911.

The spelling of 11989938 in words is "eleven million, nine hundred eighty-nine thousand, nine hundred thirty-eight".