82905020 has 24 divisors (see below), whose sum is σ = 189928368. Its totient is φ = 30147200.

The previous prime is 82904981. The next prime is 82905047. The reversal of 82905020 is 2050928.

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, 188201 + ... + 188640.

It is an arithmetic number, because the mean of its divisors is an integer number (7913682).

Almost surely, 2^82905020 is an apocalyptic number.

It is an amenable number.

82905020 is an abundant number, since it is smaller than the sum of its proper divisors (107023348).

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

82905020 is a wasteful number, since it uses less digits than its factorization.

82905020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376861 (or 376859 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 82905020 is about 9105.2193823103. The cubic root of 82905020 is about 436.0406142903.

Adding to 82905020 its reverse (2050928), we get a palindrome (84955948).

The spelling of 82905020 in words is "eighty-two million, nine hundred five thousand, twenty".