80402769 has 6 divisors (see below), whose sum is σ = 116137346. Its totient is φ = 53601840.

The previous prime is 80402753. The next prime is 80402771. The reversal of 80402769 is 96720408.

It can be written as a sum of positive squares in only one way, i.e., 70761744 + 9641025 = 8412^2 + 3105^2 .

It is not a de Polignac number, because 80402769 - 2⁴ = 80402753 is a prime.

It is a super-2 number, since 2×80402769² = 12929210525734722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80402669) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 4466812 + ... + 4466829.

Almost surely, 2^80402769 is an apocalyptic number.

It is an amenable number.

80402769 is a deficient number, since it is larger than the sum of its proper divisors (35734577).

80402769 is a wasteful number, since it uses less digits than its factorization.

80402769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8933647 (or 8933644 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 80402769 is about 8966.7591135259. The cubic root of 80402769 is about 431.6088441073.

The spelling of 80402769 in words is "eighty million, four hundred two thousand, seven hundred sixty-nine".