13722420 has 24 divisors (see below), whose sum is σ = 38422944. Its totient is φ = 3659296.

The previous prime is 13722409. The next prime is 13722431. The reversal of 13722420 is 2422731.

It is an interprime number because it is at equal distance from previous prime (13722409) and next prime (13722431).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 114294 + ... + 114413.

It is an arithmetic number, because the mean of its divisors is an integer number (1600956).

Almost surely, 2^13722420 is an apocalyptic number.

13722420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13722420 is an abundant number, since it is smaller than the sum of its proper divisors (24700524).

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

13722420 is a wasteful number, since it uses less digits than its factorization.

13722420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228719 (or 228717 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 13722420 is about 3704.3784903813. The cubic root of 13722420 is about 239.4107070195.

The spelling of 13722420 in words is "thirteen million, seven hundred twenty-two thousand, four hundred twenty".