640614430 has 32 divisors (see below), whose sum is σ = 1185300864. Its totient is φ = 249146016.

The previous prime is 640614413. The next prime is 640614439. The reversal of 640614430 is 34416046.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640614439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94329 + ... + 100891.

It is an arithmetic number, because the mean of its divisors is an integer number (37040652).

Almost surely, 2^640614430 is an apocalyptic number.

640614430 is a deficient number, since it is larger than the sum of its proper divisors (544686434).

640614430 is a wasteful number, since it uses less digits than its factorization.

640614430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6840.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 640614430 is about 25310.3621072477. The cubic root of 640614430 is about 862.0495689111.

The spelling of 640614430 in words is "six hundred forty million, six hundred fourteen thousand, four hundred thirty".