84783680 has 28 divisors (see below), whose sum is σ = 201891900. Its totient is φ = 33913344.

The previous prime is 84783679. The next prime is 84783691. The reversal of 84783680 is 8638748.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11235904 + 73547776 = 3352^2 + 8576^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132155 + ... + 132794.

It is an arithmetic number, because the mean of its divisors is an integer number (7210425).

Almost surely, 2^84783680 is an apocalyptic number.

84783680 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

84783680 is an abundant number, since it is smaller than the sum of its proper divisors (117108220).

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

84783680 is a wasteful number, since it uses less digits than its factorization.

84783680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264966 (or 264956 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 84783680 is about 9207.8053845637. The cubic root of 84783680 is about 439.3096612600.

The spelling of 84783680 in words is "eighty-four million, seven hundred eighty-three thousand, six hundred eighty".