84523280 has 20 divisors (see below), whose sum is σ = 196516812. Its totient is φ = 33809280.

The previous prime is 84523277. The next prime is 84523289. The reversal of 84523280 is 8232548.

It can be written as a sum of positive squares in 2 ways, for example, as 39740416 + 44782864 = 6304^2 + 6692^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (84523289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 528191 + ... + 528350.

Almost surely, 2^84523280 is an apocalyptic number.

84523280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

84523280 is an abundant number, since it is smaller than the sum of its proper divisors (111993532).

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

84523280 is a wasteful number, since it uses less digits than its factorization.

84523280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056554 (or 1056548 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 84523280 is about 9193.6543332888. The cubic root of 84523280 is about 438.8594427241.

The spelling of 84523280 in words is "eighty-four million, five hundred twenty-three thousand, two hundred eighty".