39879225 has 27 divisors (see below), whose sum is σ = 71598189. Its totient is φ = 21218400.

The previous prime is 39879223. The next prime is 39879227. The reversal of 39879225 is 52297893.

The square root of 39879225 is 6315.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (39879223) and next prime (39879227).

It can be written as a sum of positive squares in 4 ways, for example, as 22838841 + 17040384 = 4779^2 + 4128^2 .

It is not a de Polignac number, because 39879225 - 2¹ = 39879223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (39879223) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 94515 + ... + 94935.

Almost surely, 2^39879225 is an apocalyptic number.

39879225 is the 6315-th square number.

39879225 is the 3158-th centered octagonal number.

It is an amenable number.

39879225 is a deficient number, since it is larger than the sum of its proper divisors (31718964).

39879225 is an equidigital number, since it uses as much as digits as its factorization.

39879225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858 (or 429 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The cubic root of 39879225 is about 341.6506384179.

It can be divided in two parts, 39879 and 225, that added together give a palindrome (40104).

The spelling of 39879225 in words is "thirty-nine million, eight hundred seventy-nine thousand, two hundred twenty-five".