821072286 has 12 divisors (see below), whose sum is σ = 1778989992. Its totient is φ = 273690756.

The previous prime is 821072227. The next prime is 821072297. The reversal of 821072286 is 682270128.

It is a happy number.

It is a super-3 number, since 3×821072286³ (a number of 28 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 821072286.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22807546 + ... + 22807581.

It is an arithmetic number, because the mean of its divisors is an integer number (148249166).

Almost surely, 2^821072286 is an apocalyptic number.

821072286 is an abundant number, since it is smaller than the sum of its proper divisors (957917706).

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

821072286 is a wasteful number, since it uses less digits than its factorization.

821072286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45615135 (or 45615132 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 821072286 is about 28654.3589354220. The cubic root of 821072286 is about 936.3979720643.

The spelling of 821072286 in words is "eight hundred twenty-one million, seventy-two thousand, two hundred eighty-six".