867440280 has 256 divisors, whose sum is σ = 3091737600. Its totient is φ = 190586880.

The previous prime is 867440279. The next prime is 867440281. The reversal of 867440280 is 82044768.

It is an interprime number because it is at equal distance from previous prime (867440279) and next prime (867440281).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867440281) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3065019 + ... + 3065301.

It is an arithmetic number, because the mean of its divisors is an integer number (12077100).

Almost surely, 2^867440280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 867440280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1545868800).

867440280 is an abundant number, since it is smaller than the sum of its proper divisors (2224297320).

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

867440280 is a wasteful number, since it uses less digits than its factorization.

867440280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434 (or 430 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 39.

The square root of 867440280 is about 29452.3391261204. The cubic root of 867440280 is about 953.7031014891.

The spelling of 867440280 in words is "eight hundred sixty-seven million, four hundred forty thousand, two hundred eighty".