800021562 has 32 divisors (see below), whose sum is σ = 1704568320. Its totient is φ = 249591600.

The previous prime is 800021503. The next prime is 800021567. The reversal of 800021562 is 265120008.

It is not an unprimeable number, because it can be changed into a prime (800021567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32814 + ... + 51737.

It is an arithmetic number, because the mean of its divisors is an integer number (53267760).

Almost surely, 2^800021562 is an apocalyptic number.

800021562 is an abundant number, since it is smaller than the sum of its proper divisors (904546758).

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

800021562 is a wasteful number, since it uses less digits than its factorization.

800021562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84658.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 800021562 is about 28284.6524108040. The cubic root of 800021562 is about 928.3261068092.

The spelling of 800021562 in words is "eight hundred million, twenty-one thousand, five hundred sixty-two".