80780784 has 80 divisors (see below), whose sum is σ = 248888832. Its totient is φ = 22074624.

The previous prime is 80780779. The next prime is 80780803. The reversal of 80780784 is 48708708.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2502 + ... + 12954.

Almost surely, 2^80780784 is an apocalyptic number.

80780784 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80780784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124444416).

80780784 is an abundant number, since it is smaller than the sum of its proper divisors (168108048).

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

80780784 is a wasteful number, since it uses less digits than its factorization.

80780784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10494 (or 10488 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 42.

The square root of 80780784 is about 8987.8130821685. The cubic root of 80780784 is about 432.2841922891.

The spelling of 80780784 in words is "eighty million, seven hundred eighty thousand, seven hundred eighty-four".