84661420 has 12 divisors (see below), whose sum is σ = 177789024. Its totient is φ = 33864560.

The previous prime is 84661391. The next prime is 84661427. The reversal of 84661420 is 2416648.

It is not an unprimeable number, because it can be changed into a prime (84661427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2116516 + ... + 2116555.

It is an arithmetic number, because the mean of its divisors is an integer number (14815752).

Almost surely, 2^84661420 is an apocalyptic number.

It is an amenable number.

84661420 is an abundant number, since it is smaller than the sum of its proper divisors (93127604).

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

84661420 is a wasteful number, since it uses less digits than its factorization.

84661420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4233080 (or 4233078 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 84661420 is about 9201.1640567919. The cubic root of 84661420 is about 439.0983948272.

The spelling of 84661420 in words is "eighty-four million, six hundred sixty-one thousand, four hundred twenty".