820894412 has 24 divisors (see below), whose sum is σ = 1548187536. Its totient is φ = 378600768.

The previous prime is 820894409. The next prime is 820894423. The reversal of 820894412 is 214498028.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 78983 + ... + 88769.

It is an arithmetic number, because the mean of its divisors is an integer number (64507814).

Almost surely, 2^820894412 is an apocalyptic number.

It is an amenable number.

820894412 is a deficient number, since it is larger than the sum of its proper divisors (727293124).

820894412 is a wasteful number, since it uses less digits than its factorization.

820894412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11417 (or 11415 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 820894412 is about 28651.2549812395. The cubic root of 820894412 is about 936.3303479404.

The spelling of 820894412 in words is "eight hundred twenty million, eight hundred ninety-four thousand, four hundred twelve".