12990240 has 192 divisors, whose sum is σ = 47416320. Its totient is φ = 3317760.

The previous prime is 12990233. The next prime is 12990253. The reversal of 12990240 is 4209921.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133872 + ... + 133968.

It is an arithmetic number, because the mean of its divisors is an integer number (246960).

Almost surely, 2^12990240 is an apocalyptic number.

12990240 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 12990240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23708160).

12990240 is an abundant number, since it is smaller than the sum of its proper divisors (34426080).

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

12990240 is a wasteful number, since it uses less digits than its factorization.

12990240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 12990240 is about 3604.1975528542. The cubic root of 12990240 is about 235.0746103821.

The spelling of 12990240 in words is "twelve million, nine hundred ninety thousand, two hundred forty".