85783830 has 64 divisors (see below), whose sum is σ = 225939456. Its totient is φ = 20672000.

The previous prime is 85783829. The next prime is 85783861. The reversal of 85783830 is 3838758.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62350 + ... + 63710.

It is an arithmetic number, because the mean of its divisors is an integer number (3530304).

Almost surely, 2^85783830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85783830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112969728).

85783830 is an abundant number, since it is smaller than the sum of its proper divisors (140155626).

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

85783830 is a wasteful number, since it uses less digits than its factorization.

85783830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573.

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 85783830 is about 9261.9560569029. The cubic root of 85783830 is about 441.0303504906.

The spelling of 85783830 in words is "eighty-five million, seven hundred eighty-three thousand, eight hundred thirty".