13859550 has 72 divisors (see below), whose sum is σ = 39219960. Its totient is φ = 3499200.

The previous prime is 13859543. The next prime is 13859567. The reversal of 13859550 is 5595831.

It is a happy number.

13859550 is a `hidden beast` number, since 13 + 8 + 595 + 50 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7740 + ... + 9360.

Almost surely, 2^13859550 is an apocalyptic number.

13859550 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 13859550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19609980).

13859550 is an abundant number, since it is smaller than the sum of its proper divisors (25360410).

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

13859550 is a wasteful number, since it uses less digits than its factorization.

13859550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658 (or 1650 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 13859550 is about 3722.8416565844. The cubic root of 13859550 is about 240.2055530661.

The spelling of 13859550 in words is "thirteen million, eight hundred fifty-nine thousand, five hundred fifty".