12922840 has 32 divisors (see below), whose sum is σ = 33230880. Its totient is φ = 4430592.

The previous prime is 12922837. The next prime is 12922853. The reversal of 12922840 is 4822921.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 12922799 and 12922808.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22797 + ... + 23356.

It is an arithmetic number, because the mean of its divisors is an integer number (1038465).

Almost surely, 2^12922840 is an apocalyptic number.

12922840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12922840 is an abundant number, since it is smaller than the sum of its proper divisors (20308040).

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

12922840 is a wasteful number, since it uses less digits than its factorization.

12922840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46171 (or 46167 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 12922840 is about 3594.8351839827. The cubic root of 12922840 is about 234.6673428154.

The spelling of 12922840 in words is "twelve million, nine hundred twenty-two thousand, eight hundred forty".