13778472 has 64 divisors (see below), whose sum is σ = 36432000. Its totient is φ = 4333824.

The previous prime is 13778461. The next prime is 13778491. The reversal of 13778472 is 27487731.

It is a self number, because there is not a number n which added to its sum of digits gives 13778472.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60054 + ... + 60282.

It is an arithmetic number, because the mean of its divisors is an integer number (569250).

Almost surely, 2^13778472 is an apocalyptic number.

13778472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13778472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18216000).

13778472 is an abundant number, since it is smaller than the sum of its proper divisors (22653528).

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

13778472 is a wasteful number, since it uses less digits than its factorization.

13778472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370 (or 366 counting only the distinct ones).

The product of its digits is 65856, while the sum is 39.

The square root of 13778472 is about 3711.9364218693. The cubic root of 13778472 is about 239.7362380074.

The spelling of 13778472 in words is "thirteen million, seven hundred seventy-eight thousand, four hundred seventy-two".