39424340 has 48 divisors (see below), whose sum is σ = 86622480. Its totient is φ = 15052800.

The previous prime is 39424337. The next prime is 39424349. The reversal of 39424340 is 4342493.

It can be written as a sum of positive squares in 8 ways, for example, as 835396 + 38588944 = 914^2 + 6212^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39424349) by changing a digit.

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, 58244 + ... + 58916.

It is an arithmetic number, because the mean of its divisors is an integer number (1804635).

Almost surely, 2^39424340 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 39424340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43311240).

39424340 is an abundant number, since it is smaller than the sum of its proper divisors (47198140).

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

39424340 is a wasteful number, since it uses less digits than its factorization.

39424340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812 (or 810 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 39424340 is about 6278.8804734602. The cubic root of 39424340 is about 340.3466476081.

The spelling of 39424340 in words is "thirty-nine million, four hundred twenty-four thousand, three hundred forty".