85784620 has 24 divisors (see below), whose sum is σ = 189630000. Its totient is φ = 32507712.

The previous prime is 85784603. The next prime is 85784623. The reversal of 85784620 is 2648758.

It is not an unprimeable number, because it can be changed into a prime (85784623) 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 7 ways as a sum of consecutive naturals, for example, 112495 + ... + 113254.

It is an arithmetic number, because the mean of its divisors is an integer number (7901250).

Almost surely, 2^85784620 is an apocalyptic number.

It is an amenable number.

85784620 is an abundant number, since it is smaller than the sum of its proper divisors (103845380).

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

85784620 is a wasteful number, since it uses less digits than its factorization.

85784620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225777 (or 225775 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 85784620 is about 9261.9987043834. The cubic root of 85784620 is about 441.0317043312.

The spelling of 85784620 in words is "eighty-five million, seven hundred eighty-four thousand, six hundred twenty".