12319440 has 80 divisors (see below), whose sum is σ = 43651968. Its totient is φ = 2815488.

The previous prime is 12319427. The next prime is 12319459. The reversal of 12319440 is 4491321.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 12319440.

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, 1987 + ... + 5346.

Almost surely, 2^12319440 is an apocalyptic number.

12319440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12319440 is an abundant number, since it is smaller than the sum of its proper divisors (31332528).

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

12319440 is a wasteful number, since it uses less digits than its factorization.

12319440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7356 (or 7350 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 12319440 is about 3509.9059816468. The cubic root of 12319440 is about 230.9565706103.

The spelling of 12319440 in words is "twelve million, three hundred nineteen thousand, four hundred forty".