39428736 has 32 divisors (see below), whose sum is σ = 104733600. Its totient is φ = 13142784.

The previous prime is 39428731. The next prime is 39428747. The reversal of 39428736 is 63782493.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (39428731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50956 + ... + 51723.

It is an arithmetic number, because the mean of its divisors is an integer number (3272925).

Almost surely, 2^39428736 is an apocalyptic number.

It is an amenable number.

39428736 is an abundant number, since it is smaller than the sum of its proper divisors (65304864).

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

39428736 is a wasteful number, since it uses less digits than its factorization.

39428736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102696 (or 102684 counting only the distinct ones).

The product of its digits is 217728, while the sum is 42.

The square root of 39428736 is about 6279.2305261075. The cubic root of 39428736 is about 340.3592972239.

The spelling of 39428736 in words is "thirty-nine million, four hundred twenty-eight thousand, seven hundred thirty-six".