84639910 has 16 divisors (see below), whose sum is σ = 155895696. Its totient is φ = 33068448.

The previous prime is 84639883. The next prime is 84639911. The reversal of 84639910 is 1993648.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84639911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97989 + ... + 98848.

It is an arithmetic number, because the mean of its divisors is an integer number (9743481).

Almost surely, 2^84639910 is an apocalyptic number.

84639910 is a deficient number, since it is larger than the sum of its proper divisors (71255786).

84639910 is a wasteful number, since it uses less digits than its factorization.

84639910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196887.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 84639910 is about 9199.9951086944. The cubic root of 84639910 is about 439.0612043080.

The spelling of 84639910 in words is "eighty-four million, six hundred thirty-nine thousand, nine hundred ten".