12400123940 has 48 divisors (see below), whose sum is σ = 26280089472. Its totient is φ = 4914556416.

The previous prime is 12400123933. The next prime is 12400123961. The reversal of 12400123940 is 4932100421.

It is a super-2 number, since 2×12400123940² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1092977 + ... + 1104263.

It is an arithmetic number, because the mean of its divisors is an integer number (547501864).

Almost surely, 2^12400123940 is an apocalyptic number.

12400123940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12400123940 is an abundant number, since it is smaller than the sum of its proper divisors (13879965532).

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

12400123940 is a wasteful number, since it uses less digits than its factorization.

12400123940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11796 (or 11794 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 12400123940 in words is "twelve billion, four hundred million, one hundred twenty-three thousand, nine hundred forty".