12040534400 has 48 divisors (see below), whose sum is σ = 29743890540. Its totient is φ = 4816212480.

The previous prime is 12040534399. The next prime is 12040534439. The reversal of 12040534400 is 443504021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1878134 + ... + 1884533.

Almost surely, 2^12040534400 is an apocalyptic number.

12040534400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12040534400 is an abundant number, since it is smaller than the sum of its proper divisors (17703356140).

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

12040534400 is an equidigital number, since it uses as much as digits as its factorization.

12040534400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3762691 (or 3762674 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The spelling of 12040534400 in words is "twelve billion, forty million, five hundred thirty-four thousand, four hundred".