82542440 has 16 divisors (see below), whose sum is σ = 185720580. Its totient is φ = 33016960.

The previous prime is 82542437. The next prime is 82542443. The reversal of 82542440 is 4424528.

It is an interprime number because it is at equal distance from previous prime (82542437) and next prime (82542443).

It can be written as a sum of positive squares in 2 ways, for example, as 78039556 + 4502884 = 8834^2 + 2122^2 .

It is not an unprimeable number, because it can be changed into a prime (82542443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1031741 + ... + 1031820.

Almost surely, 2^82542440 is an apocalyptic number.

It is an amenable number.

82542440 is an abundant number, since it is smaller than the sum of its proper divisors (103178140).

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

82542440 is a wasteful number, since it uses less digits than its factorization.

82542440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2063572 (or 2063568 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 29.

The square root of 82542440 is about 9085.2870070240. The cubic root of 82542440 is about 435.4040197584.

Adding to 82542440 its reverse (4424528), we get a palindrome (86966968).

The spelling of 82542440 in words is "eighty-two million, five hundred forty-two thousand, four hundred forty".