84508240 has 20 divisors (see below), whose sum is σ = 196481844. Its totient is φ = 33803264.

The previous prime is 84508223. The next prime is 84508261. The reversal of 84508240 is 4280548.

It can be written as a sum of positive squares in 2 ways, for example, as 29333056 + 55175184 = 5416^2 + 7428^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 528097 + ... + 528256.

Almost surely, 2^84508240 is an apocalyptic number.

84508240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

84508240 is an abundant number, since it is smaller than the sum of its proper divisors (111973604).

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

84508240 is a wasteful number, since it uses less digits than its factorization.

84508240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056366 (or 1056360 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 31.

The square root of 84508240 is about 9192.8363414128. The cubic root of 84508240 is about 438.8334110889.

Adding to 84508240 its reverse (4280548), we get a palindrome (88788788).

It can be divided in two parts, 84508 and 240, that added together give a palindrome (84748).

The spelling of 84508240 in words is "eighty-four million, five hundred eight thousand, two hundred forty".