12992540 has 48 divisors (see below), whose sum is σ = 30209760. Its totient is φ = 4654080.

The previous prime is 12992533. The next prime is 12992543. The reversal of 12992540 is 4529921.

It is a junction number, because it is equal to n+sod(n) for n = 12992497 and 12992506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12992543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15656 + ... + 16464.

It is an arithmetic number, because the mean of its divisors is an integer number (629370).

Almost surely, 2^12992540 is an apocalyptic number.

12992540 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 12992540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15104880).

12992540 is an abundant number, since it is smaller than the sum of its proper divisors (17217220).

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

12992540 is a wasteful number, since it uses less digits than its factorization.

12992540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902 (or 900 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 12992540 is about 3604.5166111422. The cubic root of 12992540 is about 235.0884833538.

The spelling of 12992540 in words is "twelve million, nine hundred ninety-two thousand, five hundred forty".