39507228 has 18 divisors (see below), whose sum is σ = 99865584. Its totient is φ = 13169064.

The previous prime is 39507217. The next prime is 39507233. The reversal of 39507228 is 82270593.

It is a happy number.

39507228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1097423 = 39507228 / (3 + 9 + 5 + 0 + 7 + 2 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 39507192 and 39507201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 548676 + ... + 548747.

It is an arithmetic number, because the mean of its divisors is an integer number (5548088).

Almost surely, 2^39507228 is an apocalyptic number.

It is an amenable number.

39507228 is an abundant number, since it is smaller than the sum of its proper divisors (60358356).

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

39507228 is a wasteful number, since it uses less digits than its factorization.

39507228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097433 (or 1097428 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 39507228 is about 6285.4775474899. The cubic root of 39507228 is about 340.5850020986.

The spelling of 39507228 in words is "thirty-nine million, five hundred seven thousand, two hundred twenty-eight".