80138857 has 8 divisors (see below), whose sum is σ = 80986752. Its totient is φ = 79294800.

The previous prime is 80138843. The next prime is 80138869. The reversal of 80138857 is 75883108.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80138857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80138897) 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 7 ways as a sum of consecutive naturals, for example, 59728 + ... + 61054.

It is an arithmetic number, because the mean of its divisors is an integer number (10123344).

Almost surely, 2^80138857 is an apocalyptic number.

It is an amenable number.

80138857 is a deficient number, since it is larger than the sum of its proper divisors (847895).

80138857 is a wasteful number, since it uses less digits than its factorization.

80138857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1919.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 80138857 is about 8952.0308868994. The cubic root of 80138857 is about 431.1360925232.

The spelling of 80138857 in words is "eighty million, one hundred thirty-eight thousand, eight hundred fifty-seven".