39628939 has 4 divisors (see below), whose sum is σ = 45290224. Its totient is φ = 33967656.

The previous prime is 39628913. The next prime is 39628949. The reversal of 39628939 is 93982693.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 39628939 - 2¹¹ = 39626891 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39628892 and 39628901.

It is not an unprimeable number, because it can be changed into a prime (39628909) 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, 2830632 + ... + 2830645.

It is an arithmetic number, because the mean of its divisors is an integer number (11322556).

Almost surely, 2^39628939 is an apocalyptic number.

39628939 is a deficient number, since it is larger than the sum of its proper divisors (5661285).

39628939 is an equidigital number, since it uses as much as digits as its factorization.

39628939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5661284.

The product of its digits is 629856, while the sum is 49.

The square root of 39628939 is about 6295.1520235813. The cubic root of 39628939 is about 340.9343934006.

The spelling of 39628939 in words is "thirty-nine million, six hundred twenty-eight thousand, nine hundred thirty-nine".