13778012 has 24 divisors (see below), whose sum is σ = 25976832. Its totient is φ = 6375600.

The previous prime is 13777979. The next prime is 13778029. The reversal of 13778012 is 21087731.

13778012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13778012² = 379667229344288, which contains 22 as substring.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 437 + ... + 5267.

It is an arithmetic number, because the mean of its divisors is an integer number (1082368).

Almost surely, 2^13778012 is an apocalyptic number.

It is an amenable number.

13778012 is a deficient number, since it is larger than the sum of its proper divisors (12198820).

13778012 is a wasteful number, since it uses less digits than its factorization.

13778012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4889 (or 4887 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 13778012 is about 3711.8744590840. The cubic root of 13778012 is about 239.7335700798.

The spelling of 13778012 in words is "thirteen million, seven hundred seventy-eight thousand, twelve".