13697140 has 12 divisors (see below), whose sum is σ = 28764036. Its totient is φ = 5478848.

The previous prime is 13697129. The next prime is 13697143. The reversal of 13697140 is 4179631.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9461776 + 4235364 = 3076^2 + 2058^2 .

It is a super-2 number, since 2×13697140² = 375223288359200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13697143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342409 + ... + 342448.

It is an arithmetic number, because the mean of its divisors is an integer number (2397003).

Almost surely, 2^13697140 is an apocalyptic number.

13697140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13697140 is an abundant number, since it is smaller than the sum of its proper divisors (15066896).

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

13697140 is a wasteful number, since it uses less digits than its factorization.

13697140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684866 (or 684864 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 13697140 is about 3700.9647390917. The cubic root of 13697140 is about 239.2635992673.

The spelling of 13697140 in words is "thirteen million, six hundred ninety-seven thousand, one hundred forty".