84640284 has 36 divisors (see below), whose sum is σ = 216667360. Its totient is φ = 27855360.

The previous prime is 84640267. The next prime is 84640289. The reversal of 84640284 is 48204648.

84640284 is a `hidden beast` number, since 8 + 4 + 640 + 2 + 8 + 4 = 666.

84640284 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

84640284 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84640289) 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, 12037 + ... + 17724.

Almost surely, 2^84640284 is an apocalyptic number.

It is an amenable number.

84640284 is an abundant number, since it is smaller than the sum of its proper divisors (132027076).

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

84640284 is a wasteful number, since it uses less digits than its factorization.

84640284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29850 (or 29845 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 36.

The square root of 84640284 is about 9200.0154347697. The cubic root of 84640284 is about 439.0618510031.

The spelling of 84640284 in words is "eighty-four million, six hundred forty thousand, two hundred eighty-four".