13721792 has 56 divisors (see below), whose sum is σ = 31516320. Its totient is φ = 5806080.

The previous prime is 13721789. The next prime is 13721833. The reversal of 13721792 is 29712731.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48692 + ... + 48972.

Almost surely, 2^13721792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13721792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15758160).

13721792 is an abundant number, since it is smaller than the sum of its proper divisors (17794528).

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

13721792 is a wasteful number, since it uses less digits than its factorization.

13721792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 399 counting only the distinct ones).

The product of its digits is 5292, while the sum is 32.

The square root of 13721792 is about 3704.2937248550. The cubic root of 13721792 is about 239.4070547915.

It can be divided in two parts, 1372 and 1792, that multiplied together give a square (2458624 = 1568²).

The spelling of 13721792 in words is "thirteen million, seven hundred twenty-one thousand, seven hundred ninety-two".