84640038 has 32 divisors (see below), whose sum is σ = 200136960. Its totient is φ = 23348640.

The previous prime is 84640033. The next prime is 84640111. The reversal of 84640038 is 83004648.

It is a junction number, because it is equal to n+sod(n) for n = 84639990 and 84640008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84640033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33528 + ... + 35963.

It is an arithmetic number, because the mean of its divisors is an integer number (6254280).

Almost surely, 2^84640038 is an apocalyptic number.

84640038 is an abundant number, since it is smaller than the sum of its proper divisors (115496922).

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

84640038 is a wasteful number, since it uses less digits than its factorization.

84640038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69532.

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 84640038 is about 9200.0020652172. The cubic root of 84640038 is about 439.0614256370.

The spelling of 84640038 in words is "eighty-four million, six hundred forty thousand, thirty-eight".