640060430 has 16 divisors (see below), whose sum is σ = 1180209744. Its totient is φ = 249779520.

The previous prime is 640060427. The next prime is 640060433. The reversal of 640060430 is 34060046.

It is an interprime number because it is at equal distance from previous prime (640060427) and next prime (640060433).

It is a junction number, because it is equal to n+sod(n) for n = 640060396 and 640060405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640060433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 780152 + ... + 780971.

It is an arithmetic number, because the mean of its divisors is an integer number (73763109).

Almost surely, 2^640060430 is an apocalyptic number.

640060430 is a deficient number, since it is larger than the sum of its proper divisors (540149314).

640060430 is a wasteful number, since it uses less digits than its factorization.

640060430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561171.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 640060430 is about 25299.4156058989. The cubic root of 640060430 is about 861.8009985942.

The spelling of 640060430 in words is "six hundred forty million, sixty thousand, four hundred thirty".