13897578 has 16 divisors (see below), whose sum is σ = 28082880. Its totient is φ = 4584576.

The previous prime is 13897577. The next prime is 13897613. The reversal of 13897578 is 87579831.

13897578 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (13897577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11358 + ... + 12521.

It is an arithmetic number, because the mean of its divisors is an integer number (1755180).

Almost surely, 2^13897578 is an apocalyptic number.

13897578 is an abundant number, since it is smaller than the sum of its proper divisors (14185302).

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

13897578 is a wasteful number, since it uses less digits than its factorization.

13897578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23981.

The product of its digits is 423360, while the sum is 48.

The square root of 13897578 is about 3727.9455468126. The cubic root of 13897578 is about 240.4250454018.

The spelling of 13897578 in words is "thirteen million, eight hundred ninety-seven thousand, five hundred seventy-eight".