13749678 has 48 divisors (see below), whose sum is σ = 31554432. Its totient is φ = 4320000.

The previous prime is 13749667. The next prime is 13749679. The reversal of 13749678 is 87694731.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13749679) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22578 + ... + 23178.

It is an arithmetic number, because the mean of its divisors is an integer number (657384).

Almost surely, 2^13749678 is an apocalyptic number.

13749678 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13749678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15777216).

13749678 is an abundant number, since it is smaller than the sum of its proper divisors (17804754).

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

13749678 is a wasteful number, since it uses less digits than its factorization.

13749678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 678 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 13749678 is about 3708.0558248225. The cubic root of 13749678 is about 239.5691227329.

The spelling of 13749678 in words is "thirteen million, seven hundred forty-nine thousand, six hundred seventy-eight".