812043408 has 40 divisors (see below), whose sum is σ = 2288487456. Its totient is φ = 246073600.

The previous prime is 812043371. The next prime is 812043409. The reversal of 812043408 is 804340218.

It is not an unprimeable number, because it can be changed into a prime (812043409) 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, 768453 + ... + 769508.

Almost surely, 2^812043408 is an apocalyptic number.

812043408 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

812043408 is an abundant number, since it is smaller than the sum of its proper divisors (1476444048).

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

812043408 is a wasteful number, since it uses less digits than its factorization.

812043408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537983 (or 1537977 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 812043408 is about 28496.3753484544. The cubic root of 812043408 is about 932.9529631458.

The spelling of 812043408 in words is "eight hundred twelve million, forty-three thousand, four hundred eight".