13778652 has 24 divisors (see below), whose sum is σ = 33020176. Its totient is φ = 4468608.

The previous prime is 13778641. The next prime is 13778657. The reversal of 13778652 is 25687731.

It is a self number, because there is not a number n which added to its sum of digits gives 13778652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13778657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15073 + ... + 15960.

Almost surely, 2^13778652 is an apocalyptic number.

13778652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13778652 is an abundant number, since it is smaller than the sum of its proper divisors (19241524).

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

13778652 is a wasteful number, since it uses less digits than its factorization.

13778652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31077 (or 31075 counting only the distinct ones).

The product of its digits is 70560, while the sum is 39.

The square root of 13778652 is about 3711.9606678951. The cubic root of 13778652 is about 239.7372819629.

The spelling of 13778652 in words is "thirteen million, seven hundred seventy-eight thousand, six hundred fifty-two".