80947782 has 32 divisors (see below), whose sum is σ = 181272960. Its totient is φ = 26774280.

The previous prime is 80947777. The next prime is 80947799. The reversal of 80947782 is 28774908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1353 + ... + 12795.

It is an arithmetic number, because the mean of its divisors is an integer number (5664780).

Almost surely, 2^80947782 is an apocalyptic number.

80947782 is an abundant number, since it is smaller than the sum of its proper divisors (100325178).

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

80947782 is a wasteful number, since it uses less digits than its factorization.

80947782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11585 (or 11579 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 80947782 is about 8997.0985323047. The cubic root of 80947782 is about 432.5818740830.

It can be divided in two parts, 8094 and 7782, that added together give a square (15876 = 126²).

The spelling of 80947782 in words is "eighty million, nine hundred forty-seven thousand, seven hundred eighty-two".