11778940 has 12 divisors (see below), whose sum is σ = 24735816. Its totient is φ = 4711568.

The previous prime is 11778919. The next prime is 11778953. The reversal of 11778940 is 4987711.

It is a self number, because there is not a number n which added to its sum of digits gives 11778940.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294454 + ... + 294493.

It is an arithmetic number, because the mean of its divisors is an integer number (2061318).

Almost surely, 2^11778940 is an apocalyptic number.

11778940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11778940 is an abundant number, since it is smaller than the sum of its proper divisors (12956876).

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

11778940 is a wasteful number, since it uses less digits than its factorization.

11778940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588956 (or 588954 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 11778940 is about 3432.0460369873. The cubic root of 11778940 is about 227.5282901662.

The spelling of 11778940 in words is "eleven million, seven hundred seventy-eight thousand, nine hundred forty".