801816 has 16 divisors (see below), whose sum is σ = 2004600. Its totient is φ = 267264.

The previous prime is 801811. The next prime is 801817. The reversal of 801816 is 618108.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 33409 = 801816 / (8 + 0 + 1 + 8 + 1 + 6).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16681 + ... + 16728.

2⁸⁰¹⁸¹⁶ is an apocalyptic number.

It is an amenable number.

801816 is an abundant number, since it is smaller than the sum of its proper divisors (1202784).

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

801816 is a wasteful number, since it uses less digits than its factorization.

801816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33418 (or 33414 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 801816 is about 895.4417904029. The cubic root of 801816 is about 92.9019662999.

The spelling of 801816 in words is "eight hundred one thousand, eight hundred sixteen".