820894002 has 16 divisors (see below), whose sum is σ = 1645533120. Its totient is φ = 273007152.

The previous prime is 820893991. The next prime is 820894003. The reversal of 820894002 is 200498028.

It is not an unprimeable number, because it can be changed into a prime (820894003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153193 + ... + 158460.

It is an arithmetic number, because the mean of its divisors is an integer number (102845820).

Almost surely, 2^820894002 is an apocalyptic number.

820894002 is an abundant number, since it is smaller than the sum of its proper divisors (824639118).

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

820894002 is a wasteful number, since it uses less digits than its factorization.

820894002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312097.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 820894002 is about 28651.2478262291. The cubic root of 820894002 is about 936.3301920553.

The spelling of 820894002 in words is "eight hundred twenty million, eight hundred ninety-four thousand, two".