82685790 has 120 divisors (see below), whose sum is σ = 249184728. Its totient is φ = 18865920.

The previous prime is 82685789. The next prime is 82685803. The reversal of 82685790 is 9758628.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 4863862 + ... + 4863878.

Almost surely, 2^82685790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82685790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124592364).

82685790 is an abundant number, since it is smaller than the sum of its proper divisors (166498938).

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

82685790 is a wasteful number, since it uses less digits than its factorization.

82685790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92 (or 38 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 82685790 is about 9093.1727136352. The cubic root of 82685790 is about 435.6559268148.

The spelling of 82685790 in words is "eighty-two million, six hundred eighty-five thousand, seven hundred ninety".