640524214 has 8 divisors (see below), whose sum is σ = 1048130568. Its totient is φ = 291147360.

The previous prime is 640524211. The next prime is 640524251. The reversal of 640524214 is 412425046.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640524211) 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, 14557347 + ... + 14557390.

It is an arithmetic number, because the mean of its divisors is an integer number (131016321).

Almost surely, 2^640524214 is an apocalyptic number.

640524214 is a deficient number, since it is larger than the sum of its proper divisors (407606354).

640524214 is a wasteful number, since it uses less digits than its factorization.

640524214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29114750.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 640524214 is about 25308.5798495293. The cubic root of 640524214 is about 862.0091003071.

The spelling of 640524214 in words is "six hundred forty million, five hundred twenty-four thousand, two hundred fourteen".