640214030 has 32 divisors (see below), whose sum is σ = 1183219488. Its totient is φ = 249308800.

The previous prime is 640214027. The next prime is 640214041. The reversal of 640214030 is 30412046.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 640213993 and 640214011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64820 + ... + 74040.

It is an arithmetic number, because the mean of its divisors is an integer number (36975609).

Almost surely, 2^640214030 is an apocalyptic number.

640214030 is a deficient number, since it is larger than the sum of its proper divisors (543005458).

640214030 is a wasteful number, since it uses less digits than its factorization.

640214030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9412.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 640214030 is about 25302.4510670409. The cubic root of 640214030 is about 861.8699306511.

Adding to 640214030 its reverse (30412046), we get a palindrome (670626076).

The spelling of 640214030 in words is "six hundred forty million, two hundred fourteen thousand, thirty".