640607883 has 8 divisors (see below), whose sum is σ = 883597200. Its totient is φ = 412345248.

The previous prime is 640607881. The next prime is 640607887. The reversal of 640607883 is 388706046.

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

It is not a de Polignac number, because 640607883 - 2¹ = 640607881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (640607881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3681568 + ... + 3681741.

It is an arithmetic number, because the mean of its divisors is an integer number (110449650).

Almost surely, 2^640607883 is an apocalyptic number.

640607883 is a deficient number, since it is larger than the sum of its proper divisors (242989317).

640607883 is a wasteful number, since it uses less digits than its factorization.

640607883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7363341.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 640607883 is about 25310.2327725369. The cubic root of 640607883 is about 862.0466322212.

The spelling of 640607883 in words is "six hundred forty million, six hundred seven thousand, eight hundred eighty-three".