82867640 has 32 divisors (see below), whose sum is σ = 186814080. Its totient is φ = 33082752.

The previous prime is 82867637. The next prime is 82867657. The reversal of 82867640 is 4676828.

It is a congruent 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, 22574 + ... + 25986.

It is an arithmetic number, because the mean of its divisors is an integer number (5837940).

Almost surely, 2^82867640 is an apocalyptic number.

It is an amenable number.

82867640 is an abundant number, since it is smaller than the sum of its proper divisors (103946440).

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

82867640 is a wasteful number, since it uses less digits than its factorization.

82867640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4031 (or 4027 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 82867640 is about 9103.1664820545. The cubic root of 82867640 is about 435.9750708189.

The spelling of 82867640 in words is "eighty-two million, eight hundred sixty-seven thousand, six hundred forty".