12402973240 has 64 divisors (see below), whose sum is σ = 31967328960. Its totient is φ = 4242585600.

The previous prime is 12402973213. The next prime is 12402973249. The reversal of 12402973240 is 4237920421.

It is a junction number, because it is equal to n+sod(n) for n = 12402973196 and 12402973205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12402973249) 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, 70090 + ... + 172390.

It is an arithmetic number, because the mean of its divisors is an integer number (499489515).

Almost surely, 2^12402973240 is an apocalyptic number.

12402973240 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 12402973240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15983664480).

12402973240 is an abundant number, since it is smaller than the sum of its proper divisors (19564355720).

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

12402973240 is a wasteful number, since it uses less digits than its factorization.

12402973240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102752 (or 102748 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The spelling of 12402973240 in words is "twelve billion, four hundred two million, nine hundred seventy-three thousand, two hundred forty".