640346414 has 4 divisors (see below), whose sum is σ = 960519624. Its totient is φ = 320173206.

The previous prime is 640346407. The next prime is 640346459. The reversal of 640346414 is 414643046.

640346414 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160086602 + ... + 160086605.

It is an arithmetic number, because the mean of its divisors is an integer number (240129906).

Almost surely, 2^640346414 is an apocalyptic number.

640346414 is a deficient number, since it is larger than the sum of its proper divisors (320173210).

640346414 is a wasteful number, since it uses less digits than its factorization.

640346414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320173209.

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 640346414 is about 25305.0669629622. The cubic root of 640346414 is about 861.9293326219.

The spelling of 640346414 in words is "six hundred forty million, three hundred forty-six thousand, four hundred fourteen".