13940004438 has 12 divisors (see below), whose sum is σ = 30203342988. Its totient is φ = 4646668140.

The previous prime is 13940004431. The next prime is 13940004457. The reversal of 13940004438 is 83440004931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13940004431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 387222328 + ... + 387222363.

It is an arithmetic number, because the mean of its divisors is an integer number (2516945249).

Almost surely, 2^13940004438 is an apocalyptic number.

13940004438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13940004438 is an abundant number, since it is smaller than the sum of its proper divisors (16263338550).

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

13940004438 is a wasteful number, since it uses less digits than its factorization.

13940004438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774444699 (or 774444696 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 13940004438 in words is "thirteen billion, nine hundred forty million, four thousand, four hundred thirty-eight".