82864040 has 32 divisors (see below), whose sum is σ = 213079680. Its totient is φ = 28410432.

The previous prime is 82864007. The next prime is 82864043. The reversal of 82864040 is 4046828.

It is a junction number, because it is equal to n+sod(n) for n = 82863988 and 82864006.

It is not an unprimeable number, because it can be changed into a prime (82864043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147692 + ... + 148251.

It is an arithmetic number, because the mean of its divisors is an integer number (6658740).

Almost surely, 2^82864040 is an apocalyptic number.

It is an amenable number.

82864040 is an abundant number, since it is smaller than the sum of its proper divisors (130215640).

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

82864040 is a wasteful number, since it uses less digits than its factorization.

82864040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295961 (or 295957 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 82864040 is about 9102.9687465134. The cubic root of 82864040 is about 435.9687574055.

The spelling of 82864040 in words is "eighty-two million, eight hundred sixty-four thousand, forty".