11938905 has 48 divisors (see below), whose sum is σ = 22913280. Its totient is φ = 5702400.

The previous prime is 11938891. The next prime is 11938919. The reversal of 11938905 is 50983911.

It is a happy number.

11938905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11938891) and next prime (11938919).

It is not a de Polignac number, because 11938905 - 2⁹ = 11938393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11938905.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43920 + ... + 44190.

It is an arithmetic number, because the mean of its divisors is an integer number (477360).

Almost surely, 2^11938905 is an apocalyptic number.

11938905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11938905 is a deficient number, since it is larger than the sum of its proper divisors (10974375).

11938905 is a wasteful number, since it uses less digits than its factorization.

11938905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 11938905 is about 3455.2720587531. The cubic root of 11938905 is about 228.5536521704.

Adding to 11938905 its sum of digits (36), we get a triangular number (11938941 = T₄₈₈₆).

The spelling of 11938905 in words is "eleven million, nine hundred thirty-eight thousand, nine hundred five".