13538890 has 16 divisors (see below), whose sum is σ = 24595560. Its totient is φ = 5365440.

The previous prime is 13538879. The next prime is 13538923. The reversal of 13538890 is 9883531.

13538890 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 4 ways, for example, as 13490929 + 47961 = 3673^2 + 219^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5121 + ... + 7300.

Almost surely, 2^13538890 is an apocalyptic number.

13538890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13538890 is a deficient number, since it is larger than the sum of its proper divisors (11056670).

13538890 is a wasteful number, since it uses less digits than its factorization.

13538890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12537.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 13538890 is about 3679.5230669205. The cubic root of 13538890 is about 238.3385831348.

The spelling of 13538890 in words is "thirteen million, five hundred thirty-eight thousand, eight hundred ninety".