13860387 has 12 divisors (see below), whose sum is σ = 20077824. Its totient is φ = 9213840.

The previous prime is 13860383. The next prime is 13860391. The reversal of 13860387 is 78306831.

It is an interprime number because it is at equal distance from previous prime (13860383) and next prime (13860391).

It is not a de Polignac number, because 13860387 - 2² = 13860383 is a prime.

It is a super-2 number, since 2×13860387² = 384220655579538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13860383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1437 + ... + 5457.

It is an arithmetic number, because the mean of its divisors is an integer number (1673152).

Almost surely, 2^13860387 is an apocalyptic number.

13860387 is a deficient number, since it is larger than the sum of its proper divisors (6217437).

13860387 is a wasteful number, since it uses less digits than its factorization.

13860387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4410 (or 4407 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 13860387 is about 3722.9540690156. The cubic root of 13860387 is about 240.2103884324.

The spelling of 13860387 in words is "thirteen million, eight hundred sixty thousand, three hundred eighty-seven".