13857690 has 96 divisors (see below), whose sum is σ = 42254784. Its totient is φ = 2876160.

The previous prime is 13857667. The next prime is 13857691. The reversal of 13857690 is 9675831.

It is a super-2 number, since 2×13857690² = 384071144272200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13857691) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15742 + ... + 16598.

It is an arithmetic number, because the mean of its divisors is an integer number (440154).

Almost surely, 2^13857690 is an apocalyptic number.

13857690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13857690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21127392).

13857690 is an abundant number, since it is smaller than the sum of its proper divisors (28397094).

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

13857690 is a wasteful number, since it uses less digits than its factorization.

13857690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892 (or 885 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 13857690 is about 3722.5918390283. The cubic root of 13857690 is about 240.1948071108.

The spelling of 13857690 in words is "thirteen million, eight hundred fifty-seven thousand, six hundred ninety".