39244420 has 48 divisors (see below), whose sum is σ = 85398768. Its totient is φ = 15137280.

The previous prime is 39244399. The next prime is 39244451. The reversal of 39244420 is 2444293.

It can be written as a sum of positive squares in 8 ways, for example, as 331776 + 38912644 = 576^2 + 6238^2 .

It is a super-2 number, since 2×39244420² = 3080249002272800, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 133794 + ... + 134086.

It is an arithmetic number, because the mean of its divisors is an integer number (1779141).

Almost surely, 2^39244420 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 39244420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42699384).

39244420 is an abundant number, since it is smaller than the sum of its proper divisors (46154348).

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

39244420 is a wasteful number, since it uses less digits than its factorization.

39244420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520 (or 518 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 39244420 is about 6264.5366947604. The cubic root of 39244420 is about 339.8281138100.

The spelling of 39244420 in words is "thirty-nine million, two hundred forty-four thousand, four hundred twenty".