810193404 has 24 divisors (see below), whose sum is σ = 1926121680. Its totient is φ = 264968704.

The previous prime is 810193381. The next prime is 810193409. The reversal of 810193404 is 404391018.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810193409) 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, 636309 + ... + 637580.

It is an arithmetic number, because the mean of its divisors is an integer number (80255070).

Almost surely, 2^810193404 is an apocalyptic number.

It is an amenable number.

810193404 is an abundant number, since it is smaller than the sum of its proper divisors (1115928276).

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

810193404 is a wasteful number, since it uses less digits than its factorization.

810193404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273949 (or 1273947 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 810193404 is about 28463.8965006550. The cubic root of 810193404 is about 932.2439373877.

The spelling of 810193404 in words is "eight hundred ten million, one hundred ninety-three thousand, four hundred four".