810400478 has 8 divisors (see below), whose sum is σ = 1216716168. Its totient is φ = 404828424.

The previous prime is 810400457. The next prime is 810400499. The reversal of 810400478 is 874004018.

It is an interprime number because it is at equal distance from previous prime (810400457) and next prime (810400499).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 183176 + ... + 187547.

It is an arithmetic number, because the mean of its divisors is an integer number (152089521).

Almost surely, 2^810400478 is an apocalyptic number.

810400478 is a deficient number, since it is larger than the sum of its proper divisors (406315690).

810400478 is a wasteful number, since it uses less digits than its factorization.

810400478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371818.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 810400478 is about 28467.5337533830. The cubic root of 810400478 is about 932.3233534201.

The spelling of 810400478 in words is "eight hundred ten million, four hundred thousand, four hundred seventy-eight".