80779872 has 24 divisors (see below), whose sum is σ = 212047416. Its totient is φ = 26926592.

The previous prime is 80779847. The next prime is 80779879. The reversal of 80779872 is 27897708.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80779879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420633 + ... + 420824.

It is an arithmetic number, because the mean of its divisors is an integer number (8835309).

Almost surely, 2^80779872 is an apocalyptic number.

It is an amenable number.

80779872 is an abundant number, since it is smaller than the sum of its proper divisors (131267544).

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

80779872 is a wasteful number, since it uses less digits than its factorization.

80779872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841470 (or 841462 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 48.

The square root of 80779872 is about 8987.7623466578. The cubic root of 80779872 is about 432.2825654803.

The spelling of 80779872 in words is "eighty million, seven hundred seventy-nine thousand, eight hundred seventy-two".