11819640 has 64 divisors (see below), whose sum is σ = 40527360. Its totient is φ = 2701440.

The previous prime is 11819629. The next prime is 11819659. The reversal of 11819640 is 4691811.

11819640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×11819640⁴ (a number of 29 digits) contains 4444 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 11819598 and 11819607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6196 + ... + 7875.

It is an arithmetic number, because the mean of its divisors is an integer number (633240).

Almost surely, 2^11819640 is an apocalyptic number.

11819640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11819640 is an abundant number, since it is smaller than the sum of its proper divisors (28707720).

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

11819640 is a wasteful number, since it uses less digits than its factorization.

11819640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14092 (or 14088 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 11819640 is about 3437.9703314601. The cubic root of 11819640 is about 227.7900498819.

The spelling of 11819640 in words is "eleven million, eight hundred nineteen thousand, six hundred forty".