82740520 has 16 divisors (see below), whose sum is σ = 186166260. Its totient is φ = 33096192.

The previous prime is 82740503. The next prime is 82740527. The reversal of 82740520 is 2504728.

It can be written as a sum of positive squares in 2 ways, for example, as 80174116 + 2566404 = 8954^2 + 1602^2 .

It is not an unprimeable number, because it can be changed into a prime (82740527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1034217 + ... + 1034296.

Almost surely, 2^82740520 is an apocalyptic number.

It is an amenable number.

82740520 is an abundant number, since it is smaller than the sum of its proper divisors (103425740).

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

82740520 is a wasteful number, since it uses less digits than its factorization.

82740520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2068524 (or 2068520 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 82740520 is about 9096.1816164806. The cubic root of 82740520 is about 435.7520263184.

The spelling of 82740520 in words is "eighty-two million, seven hundred forty thousand, five hundred twenty".