84578772 has 24 divisors (see below), whose sum is σ = 197568000. Its totient is φ = 28161856.

The previous prime is 84578729. The next prime is 84578789. The reversal of 84578772 is 27787548.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 9229 + ... + 15947.

It is an arithmetic number, because the mean of its divisors is an integer number (8232000).

Almost surely, 2^84578772 is an apocalyptic number.

It is an amenable number.

84578772 is an abundant number, since it is smaller than the sum of its proper divisors (112989228).

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

84578772 is a wasteful number, since it uses less digits than its factorization.

84578772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7775 (or 7773 counting only the distinct ones).

The product of its digits is 878080, while the sum is 48.

The square root of 84578772 is about 9196.6717892942. The cubic root of 84578772 is about 438.9554630576.

The spelling of 84578772 in words is "eighty-four million, five hundred seventy-eight thousand, seven hundred seventy-two".