12039400 has 48 divisors (see below), whose sum is σ = 29646540. Its totient is φ = 4531200.

The previous prime is 12039397. The next prime is 12039403. The reversal of 12039400 is 493021.

It is an interprime number because it is at equal distance from previous prime (12039397) and next prime (12039403).

It can be written as a sum of positive squares in 6 ways, for example, as 5597956 + 6441444 = 2366^2 + 2538^2 .

It is not an unprimeable number, because it can be changed into a prime (12039403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1630 + ... + 5170.

Almost surely, 2^12039400 is an apocalyptic number.

12039400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12039400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14823270).

12039400 is an abundant number, since it is smaller than the sum of its proper divisors (17607140).

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

12039400 is a wasteful number, since it uses less digits than its factorization.

12039400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3574 (or 3565 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 12039400 is about 3469.7838549397. The cubic root of 12039400 is about 229.1931400087.

The spelling of 12039400 in words is "twelve million, thirty-nine thousand, four hundred".