13778740 has 24 divisors (see below), whose sum is σ = 29094912. Its totient is φ = 5481120.

The previous prime is 13778717. The next prime is 13778759. The reversal of 13778740 is 4787731.

It is a super-3 number, since 3×13778740³ (a number of 22 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13778740.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2017 + ... + 5623.

It is an arithmetic number, because the mean of its divisors is an integer number (1212288).

Almost surely, 2^13778740 is an apocalyptic number.

13778740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13778740 is an abundant number, since it is smaller than the sum of its proper divisors (15316172).

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

13778740 is a wasteful number, since it uses less digits than its factorization.

13778740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3807 (or 3805 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 37.

The square root of 13778740 is about 3711.9725214500. The cubic root of 13778740 is about 239.7377923378.

The spelling of 13778740 in words is "thirteen million, seven hundred seventy-eight thousand, seven hundred forty".