11981592 has 48 divisors (see below), whose sum is σ = 37087440. Its totient is φ = 3423168.

The previous prime is 11981587. The next prime is 11981603. The reversal of 11981592 is 29518911.

11981592 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 11383 + ... + 12390.

It is an arithmetic number, because the mean of its divisors is an integer number (772655).

Almost surely, 2^11981592 is an apocalyptic number.

11981592 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11981592 is an abundant number, since it is smaller than the sum of its proper divisors (25105848).

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

11981592 is a wasteful number, since it uses less digits than its factorization.

11981592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23792 (or 23785 counting only the distinct ones).

The product of its digits is 6480, while the sum is 36.

The square root of 11981592 is about 3461.4436294702. The cubic root of 11981592 is about 228.8257224899.

The spelling of 11981592 in words is "eleven million, nine hundred eighty-one thousand, five hundred ninety-two".