11801881 has 16 divisors (see below), whose sum is σ = 14805504. Its totient is φ = 9157824.

The previous prime is 11801879. The next prime is 11801897. The reversal of 11801881 is 18810811.

It is not a de Polignac number, because 11801881 - 2¹ = 11801879 is a prime.

It is a super-2 number, since 2×11801881² = 278568790276322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11801821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3600 + ... + 6046.

It is an arithmetic number, because the mean of its divisors is an integer number (925344).

Almost surely, 2^11801881 is an apocalyptic number.

It is an amenable number.

11801881 is a deficient number, since it is larger than the sum of its proper divisors (3003623).

11801881 is a wasteful number, since it uses less digits than its factorization.

11801881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520.

The product of its (nonzero) digits is 512, while the sum is 28.

The square root of 11801881 is about 3435.3865866886. The cubic root of 11801881 is about 227.6759079052.

The spelling of 11801881 in words is "eleven million, eight hundred one thousand, eight hundred eighty-one".