640280482 has 4 divisors (see below), whose sum is σ = 960420726. Its totient is φ = 320140240.

The previous prime is 640280467. The next prime is 640280489. The reversal of 640280482 is 284082046.

640280482 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 284082046 = 2 ⋅142041023.

It can be written as a sum of positive squares in only one way, i.e., 640039401 + 241081 = 25299^2 + 491^2 .

It is not an unprimeable number, because it can be changed into a prime (640280489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160070119 + ... + 160070122.

Almost surely, 2^640280482 is an apocalyptic number.

640280482 is a deficient number, since it is larger than the sum of its proper divisors (320140244).

640280482 is a wasteful number, since it uses less digits than its factorization.

640280482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320140243.

The product of its (nonzero) digits is 24576, while the sum is 34.

The square root of 640280482 is about 25303.7641863814. The cubic root of 640280482 is about 861.8997493245.

The spelling of 640280482 in words is "six hundred forty million, two hundred eighty thousand, four hundred eighty-two".