285172822 has 16 divisors (see below), whose sum is σ = 471460752. Its totient is φ = 128286720.

The previous prime is 285172819. The next prime is 285172831. The reversal of 285172822 is 228271582.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64683 + ... + 68950.

It is an arithmetic number, because the mean of its divisors is an integer number (29466297).

Almost surely, 2^285172822 is an apocalyptic number.

285172822 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

285172822 is a deficient number, since it is larger than the sum of its proper divisors (186287930).

285172822 is a wasteful number, since it uses less digits than its factorization.

285172822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133743.

The product of its digits is 35840, while the sum is 37.

The square root of 285172822 is about 16887.0607862943. The cubic root of 285172822 is about 658.2174289073.

The spelling of 285172822 in words is "two hundred eighty-five million, one hundred seventy-two thousand, eight hundred twenty-two".