39228905 has 8 divisors (see below), whose sum is σ = 47541384. Its totient is φ = 31072000.

The previous prime is 39228887. The next prime is 39228913. The reversal of 39228905 is 50982293.

It can be written as a sum of positive squares in 4 ways, for example, as 8404201 + 30824704 = 2899^2 + 5552^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-39228905 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38336 + ... + 39345.

It is an arithmetic number, because the mean of its divisors is an integer number (5942673).

Almost surely, 2^39228905 is an apocalyptic number.

It is an amenable number.

39228905 is a deficient number, since it is larger than the sum of its proper divisors (8312479).

39228905 is a wasteful number, since it uses less digits than its factorization.

39228905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77787.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 39228905 is about 6263.2982525184. The cubic root of 39228905 is about 339.7833250380.

The spelling of 39228905 in words is "thirty-nine million, two hundred twenty-eight thousand, nine hundred five".