808400844 has 24 divisors (see below), whose sum is σ = 2095854320. Its totient is φ = 269466912.

The previous prime is 808400837. The next prime is 808400851. The reversal of 808400844 is 448004808.

It is an interprime number because it is at equal distance from previous prime (808400837) and next prime (808400851).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 808400799 and 808400808.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3742489 + ... + 3742704.

Almost surely, 2^808400844 is an apocalyptic number.

It is an amenable number.

808400844 is an abundant number, since it is smaller than the sum of its proper divisors (1287453476).

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

808400844 is a wasteful number, since it uses less digits than its factorization.

808400844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7485206 (or 7485198 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 36.

The square root of 808400844 is about 28432.3907542085. The cubic root of 808400844 is about 931.5558970816. Note that the first 3 decimals are identical.

The spelling of 808400844 in words is "eight hundred eight million, four hundred thousand, eight hundred forty-four".