80857439 has 8 divisors (see below), whose sum is σ = 87892560. Its totient is φ = 73938816.

The previous prime is 80857417. The next prime is 80857451. The reversal of 80857439 is 93475808.

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

It is a cyclic number.

It is not a de Polignac number, because 80857439 - 2¹⁶ = 80791903 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80857439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80857459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27674 + ... + 30455.

It is an arithmetic number, because the mean of its divisors is an integer number (10986570).

Almost surely, 2^80857439 is an apocalyptic number.

80857439 is a deficient number, since it is larger than the sum of its proper divisors (7035121).

80857439 is a wasteful number, since it uses less digits than its factorization.

80857439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58249.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 80857439 is about 8992.0764565255. The cubic root of 80857439 is about 432.4208843223.

The spelling of 80857439 in words is "eighty million, eight hundred fifty-seven thousand, four hundred thirty-nine".