13788740 has 24 divisors (see below), whose sum is σ = 33093312. Its totient is φ = 4727520.

The previous prime is 13788721. The next prime is 13788763. The reversal of 13788740 is 4788731.

It is a junction number, because it is equal to n+sod(n) for n = 13788694 and 13788703.

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, 49106 + ... + 49385.

It is an arithmetic number, because the mean of its divisors is an integer number (1378888).

Almost surely, 2^13788740 is an apocalyptic number.

13788740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13788740 is an abundant number, since it is smaller than the sum of its proper divisors (19304572).

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

13788740 is a wasteful number, since it uses less digits than its factorization.

13788740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98507 (or 98505 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 13788740 is about 3713.3192698716. The cubic root of 13788740 is about 239.7957753412.

Subtracting from 13788740 its reverse (4788731), we obtain a palindrome (9000009).

The spelling of 13788740 in words is "thirteen million, seven hundred eighty-eight thousand, seven hundred forty".