13281690 has 32 divisors (see below), whose sum is σ = 32006016. Its totient is φ = 3527360.

The previous prime is 13281689. The next prime is 13281691. The reversal of 13281690 is 9618231.

13281690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13281689) and next prime (13281691).

It is a super-2 number, since 2×13281690² = 352806578512200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (13281691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8035 + ... + 9545.

It is an arithmetic number, because the mean of its divisors is an integer number (1000188).

Almost surely, 2^13281690 is an apocalyptic number.

13281690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13281690 is an abundant number, since it is smaller than the sum of its proper divisors (18724326).

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

13281690 is a wasteful number, since it uses less digits than its factorization.

13281690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1814.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 13281690 is about 3644.4053012803. The cubic root of 13281690 is about 236.8196744709.

The spelling of 13281690 in words is "thirteen million, two hundred eighty-one thousand, six hundred ninety".