11999385 has 24 divisors (see below), whose sum is σ = 21021000. Its totient is φ = 6331392.

The previous prime is 11999381. The next prime is 11999423. The reversal of 11999385 is 58399911.

11999385 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 76176 + 11923209 = 276^2 + 3453^2 .

It is not a de Polignac number, because 11999385 - 2² = 11999381 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 11999385.

It is not an unprimeable number, because it can be changed into a prime (11999381) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2991 + ... + 5739.

It is an arithmetic number, because the mean of its divisors is an integer number (875875).

Almost surely, 2^11999385 is an apocalyptic number.

11999385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11999385 is a deficient number, since it is larger than the sum of its proper divisors (9021615).

11999385 is a wasteful number, since it uses less digits than its factorization.

11999385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857 (or 2854 counting only the distinct ones).

The product of its digits is 87480, while the sum is 45.

The square root of 11999385 is about 3464.0128463965. The cubic root of 11999385 is about 228.9389373369.

The spelling of 11999385 in words is "eleven million, nine hundred ninety-nine thousand, three hundred eighty-five".