85821830 has 8 divisors (see below), whose sum is σ = 154479312. Its totient is φ = 34328728.

The previous prime is 85821829. The next prime is 85821863. The reversal of 85821830 is 3812858.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 4291082 + ... + 4291101.

It is an arithmetic number, because the mean of its divisors is an integer number (19309914).

Almost surely, 2^85821830 is an apocalyptic number.

85821830 is a deficient number, since it is larger than the sum of its proper divisors (68657482).

85821830 is a wasteful number, since it uses less digits than its factorization.

85821830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8582190.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 85821830 is about 9264.0072322942. The cubic root of 85821830 is about 441.0954625259.

The spelling of 85821830 in words is "eighty-five million, eight hundred twenty-one thousand, eight hundred thirty".