13478772 has 12 divisors (see below), whose sum is σ = 31450496. Its totient is φ = 4492920.

The previous prime is 13478761. The next prime is 13478779. The reversal of 13478772 is 27787431.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 13478772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13478779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561604 + ... + 561627.

Almost surely, 2^13478772 is an apocalyptic number.

13478772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13478772 is an abundant number, since it is smaller than the sum of its proper divisors (17971724).

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

13478772 is a wasteful number, since it uses less digits than its factorization.

13478772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123238 (or 1123236 counting only the distinct ones).

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

The square root of 13478772 is about 3671.3447127721. The cubic root of 13478772 is about 237.9852873235.

The spelling of 13478772 in words is "thirteen million, four hundred seventy-eight thousand, seven hundred seventy-two".