11919860 has 24 divisors (see below), whose sum is σ = 25145736. Its totient is φ = 4746240.

The previous prime is 11919857. The next prime is 11919863. The reversal of 11919860 is 6891911.

It is an interprime number because it is at equal distance from previous prime (11919857) and next prime (11919863).

It can be written as a sum of positive squares in 4 ways, for example, as 3602404 + 8317456 = 1898^2 + 2884^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11919860.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11919863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3584 + ... + 6056.

It is an arithmetic number, because the mean of its divisors is an integer number (1047739).

Almost surely, 2^11919860 is an apocalyptic number.

11919860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11919860 is an abundant number, since it is smaller than the sum of its proper divisors (13225876).

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

11919860 is a wasteful number, since it uses less digits than its factorization.

11919860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2723 (or 2721 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 11919860 is about 3452.5150253113. The cubic root of 11919860 is about 228.4320575211.

The spelling of 11919860 in words is "eleven million, nine hundred nineteen thousand, eight hundred sixty".