84404520 has 48 divisors (see below), whose sum is σ = 274315860. Its totient is φ = 22507776.

The previous prime is 84404501. The next prime is 84404521. The reversal of 84404520 is 2540448.

It can be written as a sum of positive squares in 2 ways, for example, as 79816356 + 4588164 = 8934^2 + 2142^2 .

It is not an unprimeable number, because it can be changed into a prime (84404521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116869 + ... + 117588.

Almost surely, 2^84404520 is an apocalyptic number.

It is an amenable number.

84404520 is an abundant number, since it is smaller than the sum of its proper divisors (189911340).

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

84404520 is a wasteful number, since it uses less digits than its factorization.

84404520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234474 (or 234467 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 84404520 is about 9187.1932601856. The cubic root of 84404520 is about 438.6538055847.

Adding to 84404520 its reverse (2540448), we get a palindrome (86944968).

The spelling of 84404520 in words is "eighty-four million, four hundred four thousand, five hundred twenty".