82668280 has 32 divisors (see below), whose sum is σ = 196946640. Its totient is φ = 31121920.

The previous prime is 82668277. The next prime is 82668283. The reversal of 82668280 is 8286628.

It is an interprime number because it is at equal distance from previous prime (82668277) and next prime (82668283).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82668283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60106 + ... + 61465.

Almost surely, 2^82668280 is an apocalyptic number.

It is an amenable number.

82668280 is an abundant number, since it is smaller than the sum of its proper divisors (114278360).

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

82668280 is a wasteful number, since it uses less digits than its factorization.

82668280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121599 (or 121595 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 82668280 is about 9092.2098523956. The cubic root of 82668280 is about 435.6251723413.

The spelling of 82668280 in words is "eighty-two million, six hundred sixty-eight thousand, two hundred eighty".