13404940 has 24 divisors (see below), whose sum is σ = 28239120. Its totient is φ = 5345088.

The previous prime is 13404907. The next prime is 13404943. The reversal of 13404940 is 4940431.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (13404943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6919 + ... + 8641.

It is an arithmetic number, because the mean of its divisors is an integer number (1176630).

Almost surely, 2^13404940 is an apocalyptic number.

13404940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13404940 is an abundant number, since it is smaller than the sum of its proper divisors (14834180).

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

13404940 is a wasteful number, since it uses less digits than its factorization.

13404940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121 (or 2119 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 13404940 is about 3661.2757339485. The cubic root of 13404940 is about 237.5499580963.

The spelling of 13404940 in words is "thirteen million, four hundred four thousand, nine hundred forty".