85921782 has 16 divisors (see below), whose sum is σ = 172515312. Its totient is φ = 28528640.

The previous prime is 85921763. The next prime is 85921793. The reversal of 85921782 is 28712958.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26319 + ... + 29402.

It is an arithmetic number, because the mean of its divisors is an integer number (10782207).

Almost surely, 2^85921782 is an apocalyptic number.

85921782 is an abundant number, since it is smaller than the sum of its proper divisors (86593530).

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

85921782 is a wasteful number, since it uses less digits than its factorization.

85921782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55983.

The product of its digits is 80640, while the sum is 42.

The square root of 85921782 is about 9269.4003042268. The cubic root of 85921782 is about 441.2666360256.

The spelling of 85921782 in words is "eighty-five million, nine hundred twenty-one thousand, seven hundred eighty-two".