84642472 has 8 divisors (see below), whose sum is σ = 158704650. Its totient is φ = 42321232.

The previous prime is 84642463. The next prime is 84642479. The reversal of 84642472 is 27424648.

It can be written as a sum of positive squares in only one way, i.e., 66031876 + 18610596 = 8126^2 + 4314^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (84642479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5290147 + ... + 5290162.

Almost surely, 2^84642472 is an apocalyptic number.

It is an amenable number.

84642472 is a deficient number, since it is larger than the sum of its proper divisors (74062178).

84642472 is a wasteful number, since it uses less digits than its factorization.

84642472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10580315 (or 10580311 counting only the distinct ones).

The product of its digits is 86016, while the sum is 37.

The square root of 84642472 is about 9200.1343468452. The cubic root of 84642472 is about 439.0656343043.

The spelling of 84642472 in words is "eighty-four million, six hundred forty-two thousand, four hundred seventy-two".