84724720 has 20 divisors (see below), whose sum is σ = 196985160. Its totient is φ = 33889856.

The previous prime is 84724699. The next prime is 84724723. The reversal of 84724720 is 2742748.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84724723) 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, 529450 + ... + 529609.

It is an arithmetic number, because the mean of its divisors is an integer number (9849258).

Almost surely, 2^84724720 is an apocalyptic number.

84724720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

84724720 is an abundant number, since it is smaller than the sum of its proper divisors (112260440).

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

84724720 is a wasteful number, since it uses less digits than its factorization.

84724720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059072 (or 1059066 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 34.

The square root of 84724720 is about 9204.6031962274. The cubic root of 84724720 is about 439.2078031976.

The spelling of 84724720 in words is "eighty-four million, seven hundred twenty-four thousand, seven hundred twenty".