82709890 has 16 divisors (see below), whose sum is σ = 149587200. Its totient is φ = 32926320.

The previous prime is 82709873. The next prime is 82709929. The reversal of 82709890 is 9890728.

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, 17490 + ... + 21709.

It is an arithmetic number, because the mean of its divisors is an integer number (9349200).

Almost surely, 2^82709890 is an apocalyptic number.

82709890 is a deficient number, since it is larger than the sum of its proper divisors (66877310).

82709890 is a wasteful number, since it uses less digits than its factorization.

82709890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39417.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 82709890 is about 9094.4977871238. The cubic root of 82709890 is about 435.6982488307.

The spelling of 82709890 in words is "eighty-two million, seven hundred nine thousand, eight hundred ninety".