80879805 has 24 divisors (see below), whose sum is σ = 141972480. Its totient is φ = 42588000.

The previous prime is 80879803. The next prime is 80879807. The reversal of 80879805 is 50897808.

It is an interprime number because it is at equal distance from previous prime (80879803) and next prime (80879807).

It is not a de Polignac number, because 80879805 - 2¹ = 80879803 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80879803) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7821 + ... + 14930.

It is an arithmetic number, because the mean of its divisors is an integer number (5915520).

Almost surely, 2^80879805 is an apocalyptic number.

It is an amenable number.

80879805 is a deficient number, since it is larger than the sum of its proper divisors (61092675).

80879805 is a wasteful number, since it uses less digits than its factorization.

80879805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22841 (or 22838 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 80879805 is about 8993.3200209934. The cubic root of 80879805 is about 432.4607513361.

The spelling of 80879805 in words is "eighty million, eight hundred seventy-nine thousand, eight hundred five".