806404436 has 24 divisors (see below), whose sum is σ = 1431821160. Its totient is φ = 397343232.

The previous prime is 806404433. The next prime is 806404481. The reversal of 806404436 is 634404608.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1547536 + 804856900 = 1244^2 + 28370^2 .

It is a super-2 number, since 2×806404436² = 1300576228800956192, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 806404396 and 806404405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806404433) 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, 107810 + ... + 115046.

It is an arithmetic number, because the mean of its divisors is an integer number (59659215).

Almost surely, 2^806404436 is an apocalyptic number.

It is an amenable number.

806404436 is a deficient number, since it is larger than the sum of its proper divisors (625416724).

806404436 is a wasteful number, since it uses less digits than its factorization.

806404436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7643 (or 7641 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 35.

The square root of 806404436 is about 28397.2610651098. The cubic root of 806404436 is about 930.7884153272.

The spelling of 806404436 in words is "eight hundred six million, four hundred four thousand, four hundred thirty-six".