13378890 has 32 divisors (see below), whose sum is σ = 36696960. Its totient is φ = 3057984.

The previous prime is 13378873. The next prime is 13378903. The reversal of 13378890 is 9887331.

It is a Curzon number.

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, 31645 + ... + 32064.

It is an arithmetic number, because the mean of its divisors is an integer number (1146780).

Almost surely, 2^13378890 is an apocalyptic number.

13378890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13378890 is an abundant number, since it is smaller than the sum of its proper divisors (23318070).

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

13378890 is a wasteful number, since it uses less digits than its factorization.

13378890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63726.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 13378890 is about 3657.7165007693. The cubic root of 13378890 is about 237.3959803025.

The spelling of 13378890 in words is "thirteen million, three hundred seventy-eight thousand, eight hundred ninety".