801405816 has 32 divisors (see below), whose sum is σ = 2006076240. Its totient is φ = 266793728.

The previous prime is 801405809. The next prime is 801405833. The reversal of 801405816 is 618504108.

It is a congruent number.

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, 1821 + ... + 40076.

Almost surely, 2^801405816 is an apocalyptic number.

It is an amenable number.

801405816 is an abundant number, since it is smaller than the sum of its proper divisors (1204670424).

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

801405816 is a wasteful number, since it uses less digits than its factorization.

801405816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42703 (or 42699 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 801405816 is about 28309.1118899905. Note that the first 3 decimals coincide. The cubic root of 801405816 is about 928.8612168379.

The spelling of 801405816 in words is "eight hundred one million, four hundred five thousand, eight hundred sixteen".