12299640 has 32 divisors (see below), whose sum is σ = 36899280. Its totient is φ = 3279872.

The previous prime is 12299633. The next prime is 12299647. The reversal of 12299640 is 4699221.

It is an interprime number because it is at equal distance from previous prime (12299633) and next prime (12299647).

It is a super-2 number, since 2×12299640² = 302562288259200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12299647) 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, 51129 + ... + 51368.

Almost surely, 2^12299640 is an apocalyptic number.

12299640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12299640 is an abundant number, since it is smaller than the sum of its proper divisors (24599640).

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

12299640 is a wasteful number, since it uses less digits than its factorization.

12299640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102511 (or 102507 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 12299640 is about 3507.0842590391. The cubic root of 12299640 is about 230.8327719044.

The spelling of 12299640 in words is "twelve million, two hundred ninety-nine thousand, six hundred forty".