13978602 has 64 divisors (see below), whose sum is σ = 34369920. Its totient is φ = 4176000.

The previous prime is 13978571. The next prime is 13978619. The reversal of 13978602 is 20687931.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59878 + ... + 60110.

It is an arithmetic number, because the mean of its divisors is an integer number (537030).

Almost surely, 2^13978602 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13978602, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17184960).

13978602 is an abundant number, since it is smaller than the sum of its proper divisors (20391318).

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

13978602 is a wasteful number, since it uses less digits than its factorization.

13978602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 350 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 13978602 is about 3738.7968653031. The cubic root of 13978602 is about 240.8913727953.

It can be divided in two parts, 1397 and 8602, that added together give a palindrome (9999).

The spelling of 13978602 in words is "thirteen million, nine hundred seventy-eight thousand, six hundred two".