80812784 has 80 divisors (see below), whose sum is σ = 177321984. Its totient is φ = 35424000.

The previous prime is 80812783. The next prime is 80812807. The reversal of 80812784 is 48721808.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80812783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 535109 + ... + 535259.

Almost surely, 2^80812784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80812784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88660992).

80812784 is an abundant number, since it is smaller than the sum of its proper divisors (96509200).

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

80812784 is a wasteful number, since it uses less digits than its factorization.

80812784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 80812784 is about 8989.5930942396. The cubic root of 80812784 is about 432.3412655487.

The spelling of 80812784 in words is "eighty million, eight hundred twelve thousand, seven hundred eighty-four".