82704040 has 32 divisors (see below), whose sum is σ = 186507360. Its totient is φ = 33006400.

The previous prime is 82704029. The next prime is 82704047. The reversal of 82704040 is 4040728.

It is a junction number, because it is equal to n+sod(n) for n = 82703996 and 82704014.

It is not an unprimeable number, because it can be changed into a prime (82704047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17535 + ... + 21745.

It is an arithmetic number, because the mean of its divisors is an integer number (5828355).

Almost surely, 2^82704040 is an apocalyptic number.

It is an amenable number.

82704040 is an abundant number, since it is smaller than the sum of its proper divisors (103803320).

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

82704040 is a wasteful number, since it uses less digits than its factorization.

82704040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4713 (or 4709 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 82704040 is about 9094.1761583994. The cubic root of 82704040 is about 435.6879763999.

Adding to 82704040 its reverse (4040728), we get a palindrome (86744768).

The spelling of 82704040 in words is "eighty-two million, seven hundred four thousand, forty".