82864644 has 24 divisors (see below), whose sum is σ = 193548768. Its totient is φ = 27593280.

The previous prime is 82864631. The next prime is 82864667. The reversal of 82864644 is 44646828.

It is a junction number, because it is equal to n+sod(n) for n = 82864596 and 82864605.

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, 11104 + ... + 17000.

It is an arithmetic number, because the mean of its divisors is an integer number (8064532).

Almost surely, 2^82864644 is an apocalyptic number.

It is an amenable number.

82864644 is an abundant number, since it is smaller than the sum of its proper divisors (110684124).

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

82864644 is a wasteful number, since it uses less digits than its factorization.

82864644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7075 (or 7073 counting only the distinct ones).

The product of its digits is 294912, while the sum is 42.

The square root of 82864644 is about 9103.0019224429. The cubic root of 82864644 is about 435.9698166688.

The spelling of 82864644 in words is "eighty-two million, eight hundred sixty-four thousand, six hundred forty-four".