12923281392 has 160 divisors (see below), whose sum is σ = 38915794944. Its totient is φ = 3619123200.

The previous prime is 12923281387. The next prime is 12923281403. The reversal of 12923281392 is 29318232921.

It is a happy number.

It is a super-2 number, since 2×12923281392² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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, 6906217 + ... + 6908087.

Almost surely, 2^12923281392 is an apocalyptic number.

12923281392 is a gapful number since it is divisible by the number (12) 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 12923281392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19457897472).

12923281392 is an abundant number, since it is smaller than the sum of its proper divisors (25992513552).

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

12923281392 is a wasteful number, since it uses less digits than its factorization.

12923281392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2287 (or 2281 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The spelling of 12923281392 in words is "twelve billion, nine hundred twenty-three million, two hundred eighty-one thousand, three hundred ninety-two".