640389482 has 8 divisors (see below), whose sum is σ = 960783552. Its totient is φ = 320128300.

The previous prime is 640389479. The next prime is 640389511. The reversal of 640389482 is 284983046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20144 + ... + 41067.

It is an arithmetic number, because the mean of its divisors is an integer number (120097944).

Almost surely, 2^640389482 is an apocalyptic number.

640389482 is a deficient number, since it is larger than the sum of its proper divisors (320394070).

640389482 is a wasteful number, since it uses less digits than its factorization.

640389482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66444.

The product of its (nonzero) digits is 331776, while the sum is 44.

The square root of 640389482 is about 25305.9179244698. The cubic root of 640389482 is about 861.9486558817.

The spelling of 640389482 in words is "six hundred forty million, three hundred eighty-nine thousand, four hundred eighty-two".