84421656 has 64 divisors (see below), whose sum is σ = 255830400. Its totient is φ = 25581600.

The previous prime is 84421619. The next prime is 84421657. The reversal of 84421656 is 65612448.

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

It is a self number, because there is not a number n which added to its sum of digits gives 84421656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84421657) 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, 15390 + ... + 20141.

It is an arithmetic number, because the mean of its divisors is an integer number (3997350).

Almost surely, 2^84421656 is an apocalyptic number.

It is an amenable number.

84421656 is an abundant number, since it is smaller than the sum of its proper divisors (171408744).

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

84421656 is a wasteful number, since it uses less digits than its factorization.

84421656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35557 (or 35547 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 84421656 is about 9188.1258154207. The cubic root of 84421656 is about 438.6834890779.

It can be divided in two parts, 844 and 21656, that added together give a square (22500 = 150²).

The spelling of 84421656 in words is "eighty-four million, four hundred twenty-one thousand, six hundred fifty-six".