82013890 has 32 divisors (see below), whose sum is σ = 171489024. Its totient is φ = 27656640.

The previous prime is 82013887. The next prime is 82013917. The reversal of 82013890 is 9831028.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5334 + ... + 13873.

It is an arithmetic number, because the mean of its divisors is an integer number (5359032).

Almost surely, 2^82013890 is an apocalyptic number.

82013890 is an abundant number, since it is smaller than the sum of its proper divisors (89475134).

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

82013890 is a wasteful number, since it uses less digits than its factorization.

82013890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19282.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 82013890 is about 9056.1520526104. The cubic root of 82013890 is about 434.4726776179.

The spelling of 82013890 in words is "eighty-two million, thirteen thousand, eight hundred ninety".