82640475 has 36 divisors (see below), whose sum is σ = 148619952. Its totient is φ = 43896000.

The previous prime is 82640473. The next prime is 82640483. The reversal of 82640475 is 57404628.

82640475 is a `hidden beast` number, since 8 + 2 + 640 + 4 + 7 + 5 = 666.

It is not a de Polignac number, because 82640475 - 2¹ = 82640473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82640473) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 69385 + ... + 70565.

It is an arithmetic number, because the mean of its divisors is an integer number (4128332).

Almost surely, 2^82640475 is an apocalyptic number.

82640475 is a deficient number, since it is larger than the sum of its proper divisors (65979477).

82640475 is a wasteful number, since it uses less digits than its factorization.

82640475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508 (or 1500 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 82640475 is about 9090.6806675848. The cubic root of 82640475 is about 435.5763268584.

The spelling of 82640475 in words is "eighty-two million, six hundred forty thousand, four hundred seventy-five".