13857490 has 8 divisors (see below), whose sum is σ = 24943500. Its totient is φ = 5542992.

The previous prime is 13857461. The next prime is 13857509. The reversal of 13857490 is 9475831.

It can be written as a sum of positive squares in 2 ways, for example, as 11580409 + 2277081 = 3403^2 + 1509^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 692865 + ... + 692884.

Almost surely, 2^13857490 is an apocalyptic number.

13857490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13857490 is a deficient number, since it is larger than the sum of its proper divisors (11086010).

13857490 is a wasteful number, since it uses less digits than its factorization.

13857490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385756.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 13857490 is about 3722.5649759272. The cubic root of 13857490 is about 240.1936515745.

The spelling of 13857490 in words is "thirteen million, eight hundred fifty-seven thousand, four hundred ninety".