39820224 has 56 divisors (see below), whose sum is σ = 106109008. Its totient is φ = 13178880.

The previous prime is 39820217. The next prime is 39820237. The reversal of 39820224 is 42202893.

It is a junction number, because it is equal to n+sod(n) for n = 39820191 and 39820200.

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, 29484 + ... + 30804.

Almost surely, 2^39820224 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 39820224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53054504).

39820224 is an abundant number, since it is smaller than the sum of its proper divisors (66288784).

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

39820224 is a wasteful number, since it uses less digits than its factorization.

39820224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493 (or 1483 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 39820224 is about 6310.3267744230. The cubic root of 39820224 is about 341.4820654449.

The spelling of 39820224 in words is "thirty-nine million, eight hundred twenty thousand, two hundred twenty-four".