640250362 has 8 divisors (see below), whose sum is σ = 1016868276. Its totient is φ = 301294272.

The previous prime is 640250357. The next prime is 640250407. The reversal of 640250362 is 263052046.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 603635761 + 36614601 = 24569^2 + 6051^2 .

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

It is a super-2 number, since 2×640250362² = 819841052082262088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 640250362.

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, 9415413 + ... + 9415480.

Almost surely, 2^640250362 is an apocalyptic number.

640250362 is a deficient number, since it is larger than the sum of its proper divisors (376617914).

640250362 is a wasteful number, since it uses less digits than its factorization.

640250362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18830912.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 640250362 is about 25303.1690110152. The cubic root of 640250362 is about 861.8862339833.

The spelling of 640250362 in words is "six hundred forty million, two hundred fifty thousand, three hundred sixty-two".