13691280 has 40 divisors (see below), whose sum is σ = 42443712. Its totient is φ = 3650944.

The previous prime is 13691269. The next prime is 13691281. The reversal of 13691280 is 8219631.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×13691280² = 374902296076800, 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 (13691281) 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, 28284 + ... + 28763.

Almost surely, 2^13691280 is an apocalyptic number.

13691280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13691280 is an abundant number, since it is smaller than the sum of its proper divisors (28752432).

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

13691280 is a wasteful number, since it uses less digits than its factorization.

13691280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57063 (or 57057 counting only the distinct ones).

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

The square root of 13691280 is about 3700.1729689300. The cubic root of 13691280 is about 239.2294732943.

The spelling of 13691280 in words is "thirteen million, six hundred ninety-one thousand, two hundred eighty".