39189285 has 32 divisors (see below), whose sum is σ = 70346880. Its totient is φ = 20697984.

The previous prime is 39189277. The next prime is 39189289. The reversal of 39189285 is 58298193.

It is a happy number.

It is not a de Polignac number, because 39189285 - 2³ = 39189277 is a prime.

It is a super-2 number, since 2×39189285² = 3071600117622450, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 39189285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39189289) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13089 + ... + 15801.

It is an arithmetic number, because the mean of its divisors is an integer number (2198340).

Almost surely, 2^39189285 is an apocalyptic number.

It is an amenable number.

39189285 is a deficient number, since it is larger than the sum of its proper divisors (31157595).

39189285 is a wasteful number, since it uses less digits than its factorization.

39189285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2834 (or 2828 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 39189285 is about 6260.1345832178. The cubic root of 39189285 is about 339.6688962341.

It can be divided in two parts, 3918 and 9285, that added together give a triangular number (13203 = T₁₆₂).

The spelling of 39189285 in words is "thirty-nine million, one hundred eighty-nine thousand, two hundred eighty-five".