82788575 has 12 divisors (see below), whose sum is σ = 103620600. Its totient is φ = 65609760.

The previous prime is 82788571. The next prime is 82788611. The reversal of 82788575 is 57588728.

It is not a de Polignac number, because 82788575 - 2² = 82788571 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82788571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12800 + ... + 18149.

It is an arithmetic number, because the mean of its divisors is an integer number (8635050).

Almost surely, 2^82788575 is an apocalyptic number.

82788575 is a deficient number, since it is larger than the sum of its proper divisors (20832025).

82788575 is a wasteful number, since it uses less digits than its factorization.

82788575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31066 (or 31061 counting only the distinct ones).

The product of its digits is 1254400, while the sum is 50.

The square root of 82788575 is about 9098.8227260454. The cubic root of 82788575 is about 435.8363703657.

The spelling of 82788575 in words is "eighty-two million, seven hundred eighty-eight thousand, five hundred seventy-five".