80689812 has 24 divisors (see below), whose sum is σ = 215173056. Its totient is φ = 23054208.

The previous prime is 80689811. The next prime is 80689841. The reversal of 80689812 is 21898608.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80689811) 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, 480213 + ... + 480380.

It is an arithmetic number, because the mean of its divisors is an integer number (8965544).

Almost surely, 2^80689812 is an apocalyptic number.

It is an amenable number.

80689812 is an abundant number, since it is smaller than the sum of its proper divisors (134483244).

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

80689812 is a wasteful number, since it uses less digits than its factorization.

80689812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960607 (or 960605 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 80689812 is about 8982.7508036236. The cubic root of 80689812 is about 432.1218577701.

The spelling of 80689812 in words is "eighty million, six hundred eighty-nine thousand, eight hundred twelve".