80857808 has 10 divisors (see below), whose sum is σ = 156662034. Its totient is φ = 40428896.

The previous prime is 80857783. The next prime is 80857817. The reversal of 80857808 is 80875808.

It can be written as a sum of positive squares in only one way, i.e., 70694464 + 10163344 = 8408^2 + 3188^2 .

It is a super-2 number, since 2×80857808² = 13075970229129728, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2526791 + ... + 2526822.

Almost surely, 2^80857808 is an apocalyptic number.

It is an amenable number.

80857808 is a deficient number, since it is larger than the sum of its proper divisors (75804226).

80857808 is a wasteful number, since it uses less digits than its factorization.

80857808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5053621 (or 5053615 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 44.

The square root of 80857808 is about 8992.0969745661. The cubic root of 80857808 is about 432.4215421182.

The spelling of 80857808 in words is "eighty million, eight hundred fifty-seven thousand, eight hundred eight".