84644636 has 12 divisors (see below), whose sum is σ = 148301328. Its totient is φ = 42272832.

The previous prime is 84644621. The next prime is 84644647. The reversal of 84644636 is 63644648.

It is a junction number, because it is equal to n+sod(n) for n = 84644593 and 84644602.

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, 8381 + ... + 15476.

It is an arithmetic number, because the mean of its divisors is an integer number (12358444).

Almost surely, 2^84644636 is an apocalyptic number.

It is an amenable number.

84644636 is a deficient number, since it is larger than the sum of its proper divisors (63656692).

84644636 is a wasteful number, since it uses less digits than its factorization.

84644636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24748 (or 24746 counting only the distinct ones).

The product of its digits is 331776, while the sum is 41.

The square root of 84644636 is about 9200.2519530717. The cubic root of 84644636 is about 439.0693760426.

The spelling of 84644636 in words is "eighty-four million, six hundred forty-four thousand, six hundred thirty-six".