80706780 has 240 divisors, whose sum is σ = 316141056. Its totient is φ = 16744320.

The previous prime is 80706767. The next prime is 80706811. The reversal of 80706780 is 8760708.

It is a happy number.

It is a hoax number, since the sum of its digits (36) 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 (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 124417 + ... + 125063.

Almost surely, 2^80706780 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 80706780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158070528).

80706780 is an abundant number, since it is smaller than the sum of its proper divisors (235434276).

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

80706780 is a wasteful number, since it uses less digits than its factorization.

80706780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686 (or 675 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 80706780 is about 8983.6952308056. The cubic root of 80706780 is about 432.1521454839.

The spelling of 80706780 in words is "eighty million, seven hundred six thousand, seven hundred eighty".