39428733 has 4 divisors (see below), whose sum is σ = 52571648. Its totient is φ = 26285820.

The previous prime is 39428731. The next prime is 39428747. The reversal of 39428733 is 33782493.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 39428733 - 2¹ = 39428731 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 39428691 and 39428700.

It is a congruent number.

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, 6571453 + ... + 6571458.

It is an arithmetic number, because the mean of its divisors is an integer number (13142912).

Almost surely, 2^39428733 is an apocalyptic number.

It is an amenable number.

39428733 is a deficient number, since it is larger than the sum of its proper divisors (13142915).

39428733 is a wasteful number, since it uses less digits than its factorization.

39428733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13142914.

The product of its digits is 108864, while the sum is 39.

The square root of 39428733 is about 6279.2302872247. The cubic root of 39428733 is about 340.3592885916.

The spelling of 39428733 in words is "thirty-nine million, four hundred twenty-eight thousand, seven hundred thirty-three".