13780738 has 16 divisors (see below), whose sum is σ = 21924000. Its totient is φ = 6478272.

The previous prime is 13780733. The next prime is 13780747. The reversal of 13780738 is 83708731.

It is a junction number, because it is equal to n+sod(n) for n = 13780697 and 13780706.

It is not an unprimeable number, because it can be changed into a prime (13780733) 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, 3978 + ... + 6586.

It is an arithmetic number, because the mean of its divisors is an integer number (1370250).

Almost surely, 2^13780738 is an apocalyptic number.

13780738 is a deficient number, since it is larger than the sum of its proper divisors (8143262).

13780738 is a wasteful number, since it uses less digits than its factorization.

13780738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2769.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 13780738 is about 3712.2416408418. The cubic root of 13780738 is about 239.7493795840.

The spelling of 13780738 in words is "thirteen million, seven hundred eighty thousand, seven hundred thirty-eight".