920872866 has 32 divisors (see below), whose sum is σ = 1857967488. Its totient is φ = 304266240.

The previous prime is 920872861. The next prime is 920872871. The reversal of 920872866 is 668278029.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (920872861) and next prime (920872871).

It is not an unprimeable number, because it can be changed into a prime (920872861) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 358860 + ... + 361416.

It is an arithmetic number, because the mean of its divisors is an integer number (58061484).

Almost surely, 2^920872866 is an apocalyptic number.

920872866 is an abundant number, since it is smaller than the sum of its proper divisors (937094622).

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

920872866 is a wasteful number, since it uses less digits than its factorization.

920872866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3066.

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 920872866 is about 30345.8871348326. The cubic root of 920872866 is about 972.8963158485.

The spelling of 920872866 in words is "nine hundred twenty million, eight hundred seventy-two thousand, eight hundred sixty-six".