640413050 has 48 divisors (see below), whose sum is σ = 1258848000. Its totient is φ = 241718400.

The previous prime is 640413049. The next prime is 640413073. The reversal of 640413050 is 50314046.

It is a happy number.

It is a super-2 number, since 2×640413050² = 820257749220605000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 265751 + ... + 268149.

It is an arithmetic number, because the mean of its divisors is an integer number (26226000).

Almost surely, 2^640413050 is an apocalyptic number.

640413050 is a deficient number, since it is larger than the sum of its proper divisors (618434950).

640413050 is a wasteful number, since it uses less digits than its factorization.

640413050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2711 (or 2706 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 640413050 is about 25306.3835820135. The cubic root of 640413050 is about 861.9592297368.

Adding to 640413050 its reverse (50314046), we get a palindrome (690727096).

The spelling of 640413050 in words is "six hundred forty million, four hundred thirteen thousand, fifty".