82508420 has 12 divisors (see below), whose sum is σ = 173267724. Its totient is φ = 33003360.

The previous prime is 82508411. The next prime is 82508467. The reversal of 82508420 is 2480528.

It can be written as a sum of positive squares in 2 ways, for example, as 46676224 + 35832196 = 6832^2 + 5986^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2062691 + ... + 2062730.

It is an arithmetic number, because the mean of its divisors is an integer number (14438977).

Almost surely, 2^82508420 is an apocalyptic number.

It is an amenable number.

82508420 is an abundant number, since it is smaller than the sum of its proper divisors (90759304).

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

82508420 is a wasteful number, since it uses less digits than its factorization.

82508420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4125430 (or 4125428 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 82508420 is about 9083.4145562118. The cubic root of 82508420 is about 435.3441940485.

Adding to 82508420 its reverse (2480528), we get a palindrome (84988948).

It can be divided in two parts, 82508 and 420, that added together give a palindrome (82928).

The spelling of 82508420 in words is "eighty-two million, five hundred eight thousand, four hundred twenty".