84065280 has 176 divisors, whose sum is σ = 290248224. Its totient is φ = 20643840.

The previous prime is 84065263. The next prime is 84065297. The reversal of 84065280 is 8256048.

It is an interprime number because it is at equal distance from previous prime (84065263) and next prime (84065297).

It is a zygodrome in base 4.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199470 + ... + 199890.

Almost surely, 2^84065280 is an apocalyptic number.

84065280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84065280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145124112).

84065280 is an abundant number, since it is smaller than the sum of its proper divisors (206182944).

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

84065280 is a wasteful number, since it uses less digits than its factorization.

84065280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 84065280 is about 9168.7120142362. The cubic root of 84065280 is about 438.0653350130.

The spelling of 84065280 in words is "eighty-four million, sixty-five thousand, two hundred eighty".