640260130 has 32 divisors (see below), whose sum is σ = 1166369904. Its totient is φ = 253034496.

The previous prime is 640260113. The next prime is 640260133. The reversal of 640260130 is 31062046.

It can be written as a sum of positive squares in 8 ways, for example, as 5774409 + 634485721 = 2403^2 + 25189^2 .

It is a super-3 number, since 3×640260130³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (640260133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301954 + ... + 304066.

Almost surely, 2^640260130 is an apocalyptic number.

640260130 is a deficient number, since it is larger than the sum of its proper divisors (526109774).

640260130 is a wasteful number, since it uses less digits than its factorization.

640260130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2470.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 640260130 is about 25303.3620295802. The cubic root of 640260130 is about 861.8906170926.

The spelling of 640260130 in words is "six hundred forty million, two hundred sixty thousand, one hundred thirty".