13697240 has 32 divisors (see below), whose sum is σ = 32633280. Its totient is φ = 5156352.

The previous prime is 13697237. The next prime is 13697261. The reversal of 13697240 is 4279631.

It is a super-2 number, since 2×13697240² = 375228767235200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13697197 and 13697206.

It is a congruent number.

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, 9392 + ... + 10751.

It is an arithmetic number, because the mean of its divisors is an integer number (1019790).

Almost surely, 2^13697240 is an apocalyptic number.

13697240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13697240 is an abundant number, since it is smaller than the sum of its proper divisors (18936040).

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

13697240 is a wasteful number, since it uses less digits than its factorization.

13697240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20171 (or 20167 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 13697240 is about 3700.9782490579. The cubic root of 13697240 is about 239.2641815373.

The spelling of 13697240 in words is "thirteen million, six hundred ninety-seven thousand, two hundred forty".