13398786 has 12 divisors (see below), whose sum is σ = 29030742. Its totient is φ = 4466256.

The previous prime is 13398779. The next prime is 13398793. The reversal of 13398786 is 68789331.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13398779) and next prime (13398793).

It can be written as a sum of positive squares in only one way, i.e., 9418761 + 3980025 = 3069^2 + 1995^2 .

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, 372171 + ... + 372206.

Almost surely, 2^13398786 is an apocalyptic number.

13398786 is an abundant number, since it is smaller than the sum of its proper divisors (15631956).

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

13398786 is a wasteful number, since it uses less digits than its factorization.

13398786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744385 (or 744382 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 13398786 is about 3660.4352200251. The cubic root of 13398786 is about 237.5136006985.

The spelling of 13398786 in words is "thirteen million, three hundred ninety-eight thousand, seven hundred eighty-six".