82570405 has 8 divisors (see below), whose sum is σ = 100339200. Its totient is φ = 65219856.

The previous prime is 82570403. The next prime is 82570417. The reversal of 82570405 is 50407528.

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 82570405 - 2¹ = 82570403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82570403) 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, 104125 + ... + 104914.

It is an arithmetic number, because the mean of its divisors is an integer number (12542400).

Almost surely, 2^82570405 is an apocalyptic number.

It is an amenable number.

82570405 is a deficient number, since it is larger than the sum of its proper divisors (17768795).

82570405 is a wasteful number, since it uses less digits than its factorization.

82570405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209123.

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 82570405 is about 9086.8259034715. The cubic root of 82570405 is about 435.4531851679.

The spelling of 82570405 in words is "eighty-two million, five hundred seventy thousand, four hundred five".