13669740 has 144 divisors (see below), whose sum is σ = 49969920. Its totient is φ = 2954880.

The previous prime is 13669739. The next prime is 13669741. The reversal of 13669740 is 4796631.

It is an interprime number because it is at equal distance from previous prime (13669739) and next prime (13669741).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 13669695 and 13669704.

It is not an unprimeable number, because it can be changed into a prime (13669741) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 23655 + ... + 24225.

Almost surely, 2^13669740 is an apocalyptic number.

13669740 is a gapful number since it is divisible by the number (10) 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 13669740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24984960).

13669740 is an abundant number, since it is smaller than the sum of its proper divisors (36300180).

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

13669740 is a wasteful number, since it uses less digits than its factorization.

13669740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612 (or 607 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 13669740 is about 3697.2611484719. The cubic root of 13669740 is about 239.1039503930.

The spelling of 13669740 in words is "thirteen million, six hundred sixty-nine thousand, seven hundred forty".