640030126 has 8 divisors (see below), whose sum is σ = 960289560. Its totient is φ = 319933608.

The previous prime is 640030121. The next prime is 640030129. The reversal of 640030126 is 621030046.

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

It is a junction number, because it is equal to n+sod(n) for n = 640030097 and 640030106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640030121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30381 + ... + 46936.

It is an arithmetic number, because the mean of its divisors is an integer number (120036195).

Almost surely, 2^640030126 is an apocalyptic number.

640030126 is a deficient number, since it is larger than the sum of its proper divisors (320259434).

640030126 is a wasteful number, since it uses less digits than its factorization.

640030126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81458.

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

The square root of 640030126 is about 25298.8166916953. The cubic root of 640030126 is about 861.7873975713.

The spelling of 640030126 in words is "six hundred forty million, thirty thousand, one hundred twenty-six".