13897530 has 24 divisors (see below), whose sum is σ = 36133812. Its totient is φ = 3705984.

The previous prime is 13897523. The next prime is 13897547. The reversal of 13897530 is 3579831.

13897530 is a `hidden beast` number, since 1 + 38 + 97 + 530 = 666.

13897530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12131289 + 1766241 = 3483^2 + 1329^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77119 + ... + 77298.

Almost surely, 2^13897530 is an apocalyptic number.

13897530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13897530 is an abundant number, since it is smaller than the sum of its proper divisors (22236282).

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

13897530 is a wasteful number, since it uses less digits than its factorization.

13897530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154430 (or 154427 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 13897530 is about 3727.9391089448. The cubic root of 13897530 is about 240.4247686049.

The spelling of 13897530 in words is "thirteen million, eight hundred ninety-seven thousand, five hundred thirty".