82007857 has 8 divisors (see below), whose sum is σ = 90077760. Its totient is φ = 74313360.

The previous prime is 82007843. The next prime is 82007869. The reversal of 82007857 is 75870028.

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 82007857 - 2¹⁹ = 81483569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82007557) 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, 93394 + ... + 94267.

It is an arithmetic number, because the mean of its divisors is an integer number (11259720).

Almost surely, 2^82007857 is an apocalyptic number.

It is an amenable number.

82007857 is a deficient number, since it is larger than the sum of its proper divisors (8069903).

82007857 is a wasteful number, since it uses less digits than its factorization.

82007857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187703.

The product of its (nonzero) digits is 31360, while the sum is 37.

The square root of 82007857 is about 9055.8189579960. The cubic root of 82007857 is about 434.4620239837.

The spelling of 82007857 in words is "eighty-two million, seven thousand, eight hundred fifty-seven".