80864019 has 24 divisors (see below), whose sum is σ = 130188240. Its totient is φ = 48066048.

The previous prime is 80864009. The next prime is 80864023. The reversal of 80864019 is 91046808.

It is a happy number.

80864019 is a `hidden beast` number, since 8 + 0 + 8 + 640 + 1 + 9 = 666.

It is not a de Polignac number, because 80864019 - 2⁵ = 80863987 is a prime.

It is a super-2 number, since 2×80864019² = 13077979137664722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80864009) 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 23 ways as a sum of consecutive naturals, for example, 11002 + ... + 16815.

It is an arithmetic number, because the mean of its divisors is an integer number (5424510).

Almost surely, 2^80864019 is an apocalyptic number.

80864019 is a deficient number, since it is larger than the sum of its proper divisors (49324221).

80864019 is a wasteful number, since it uses less digits than its factorization.

80864019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27859 (or 27856 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 80864019 is about 8992.4423267542. The cubic root of 80864019 is about 432.4326138234.

The spelling of 80864019 in words is "eighty million, eight hundred sixty-four thousand, nineteen".