82239870 has 32 divisors (see below), whose sum is σ = 197616672. Its totient is φ = 21903872.

The previous prime is 82239841. The next prime is 82239889. The reversal of 82239870 is 7893228.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42034 + ... + 43946.

It is an arithmetic number, because the mean of its divisors is an integer number (6175521).

Almost surely, 2^82239870 is an apocalyptic number.

82239870 is an abundant number, since it is smaller than the sum of its proper divisors (115376802).

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

82239870 is a wasteful number, since it uses less digits than its factorization.

82239870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3356.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 82239870 is about 9068.6200714331. The cubic root of 82239870 is about 434.8713584465.

The spelling of 82239870 in words is "eighty-two million, two hundred thirty-nine thousand, eight hundred seventy".