13770280 has 16 divisors (see below), whose sum is σ = 30983220. Its totient is φ = 5508096.

The previous prime is 13770271. The next prime is 13770283. The reversal of 13770280 is 8207731.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12659364 + 1110916 = 3558^2 + 1054^2 .

It is a super-3 number, since 3×13770280³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (13770283) 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, 172089 + ... + 172168.

Almost surely, 2^13770280 is an apocalyptic number.

13770280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13770280 is an abundant number, since it is smaller than the sum of its proper divisors (17212940).

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

13770280 is a wasteful number, since it uses less digits than its factorization.

13770280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344268 (or 344264 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 13770280 is about 3710.8327906280. The cubic root of 13770280 is about 239.6887168065.

The spelling of 13770280 in words is "thirteen million, seven hundred seventy thousand, two hundred eighty".