640250335 has 8 divisors (see below), whose sum is σ = 782796960. Its totient is φ = 502535904.

The previous prime is 640250329. The next prime is 640250341. The reversal of 640250335 is 533052046.

It is an interprime number because it is at equal distance from previous prime (640250329) and next prime (640250341).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-640250335 is a prime.

It is a super-2 number, since 2×640250335² = 819840982935224450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1207755 + ... + 1208284.

It is an arithmetic number, because the mean of its divisors is an integer number (97849620).

Almost surely, 2^640250335 is an apocalyptic number.

640250335 is a deficient number, since it is larger than the sum of its proper divisors (142546625).

640250335 is a wasteful number, since it uses less digits than its factorization.

640250335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2416097.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 640250335 is about 25303.1684774852. The cubic root of 640250335 is about 861.8862218678.

The spelling of 640250335 in words is "six hundred forty million, two hundred fifty thousand, three hundred thirty-five".