82239865 has 8 divisors (see below), whose sum is σ = 100983168. Its totient is φ = 64261680.

The previous prime is 82239841. The next prime is 82239889. The reversal of 82239865 is 56893228.

It is an interprime number because it is at equal distance from previous prime (82239841) and next prime (82239889).

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

It is not a de Polignac number, because 82239865 - 2¹⁹ = 81715577 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

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, 191041 + ... + 191470.

It is an arithmetic number, because the mean of its divisors is an integer number (12622896).

Almost surely, 2^82239865 is an apocalyptic number.

It is an amenable number.

82239865 is a deficient number, since it is larger than the sum of its proper divisors (18743303).

82239865 is a wasteful number, since it uses less digits than its factorization.

82239865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382559.

The product of its digits is 207360, while the sum is 43.

The square root of 82239865 is about 9068.6197957572. The cubic root of 82239865 is about 434.8713496335.

The spelling of 82239865 in words is "eighty-two million, two hundred thirty-nine thousand, eight hundred sixty-five".