82570840 has 32 divisors (see below), whose sum is σ = 202674960. Its totient is φ = 30025600.

The previous prime is 82570837. The next prime is 82570861. The reversal of 82570840 is 4807528.

It is a junction number, because it is equal to n+sod(n) for n = 82570796 and 82570805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93391 + ... + 94270.

Almost surely, 2^82570840 is an apocalyptic number.

It is an amenable number.

82570840 is an abundant number, since it is smaller than the sum of its proper divisors (120104120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82570840 is a wasteful number, since it uses less digits than its factorization.

82570840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187683 (or 187679 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 82570840 is about 9086.8498391907. The cubic root of 82570840 is about 435.4539498560.

The spelling of 82570840 in words is "eighty-two million, five hundred seventy thousand, eight hundred forty".