39221406 has 96 divisors (see below), whose sum is σ = 102435840. Its totient is φ = 10611648.

The previous prime is 39221389. The next prime is 39221407. The reversal of 39221406 is 60412293.

39221406 is a `hidden beast` number, since 39 + 221 + 406 = 666.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 39221406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39221407) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 219025 + ... + 219203.

It is an arithmetic number, because the mean of its divisors is an integer number (1067040).

Almost surely, 2^39221406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39221406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51217920).

39221406 is an abundant number, since it is smaller than the sum of its proper divisors (63214434).

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

39221406 is a wasteful number, since it uses less digits than its factorization.

39221406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 39221406 is about 6262.6995776582. The cubic root of 39221406 is about 339.7616726575.

Adding to 39221406 its reverse (60412293), we get a palindrome (99633699).

It can be divided in two parts, 39 and 221406, that added together give a triangular number (221445 = T₆₆₅).

The spelling of 39221406 in words is "thirty-nine million, two hundred twenty-one thousand, four hundred six".