13087620 has 288 divisors, whose sum is σ = 52835328. Its totient is φ = 2543616.

The previous prime is 13087601. The next prime is 13087631. The reversal of 13087620 is 2678031.

13087620 is a `hidden beast` number, since 1 + 30 + 8 + 7 + 620 = 666.

13087620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 278437 + ... + 278483.

It is an arithmetic number, because the mean of its divisors is an integer number (183456).

Almost surely, 2^13087620 is an apocalyptic number.

13087620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13087620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26417664).

13087620 is an abundant number, since it is smaller than the sum of its proper divisors (39747708).

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

13087620 is a wasteful number, since it uses less digits than its factorization.

13087620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 13087620 is about 3617.6815780276. The cubic root of 13087620 is about 235.6605528840.

The spelling of 13087620 in words is "thirteen million, eighty-seven thousand, six hundred twenty".