39394420 has 24 divisors (see below), whose sum is σ = 89092584. Its totient is φ = 14545536.

The previous prime is 39394379. The next prime is 39394427. The reversal of 39394420 is 2449393.

It can be written as a sum of positive squares in 4 ways, for example, as 8503056 + 30891364 = 2916^2 + 5558^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39394427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75499 + ... + 76018.

It is an arithmetic number, because the mean of its divisors is an integer number (3712191).

Almost surely, 2^39394420 is an apocalyptic number.

It is an amenable number.

39394420 is an abundant number, since it is smaller than the sum of its proper divisors (49698164).

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

39394420 is a wasteful number, since it uses less digits than its factorization.

39394420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151539 (or 151537 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 39394420 is about 6276.4974308925. The cubic root of 39394420 is about 340.2605269623.

The spelling of 39394420 in words is "thirty-nine million, three hundred ninety-four thousand, four hundred twenty".