30640064 has 56 divisors (see below), whose sum is σ = 74846688. Its totient is φ = 12119040.

The previous prime is 30640019. The next prime is 30640087. The reversal of 30640064 is 46004603.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3194 + ... + 8454.

It is an arithmetic number, because the mean of its divisors is an integer number (1336548).

Almost surely, 2^30640064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30640064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37423344).

30640064 is an abundant number, since it is smaller than the sum of its proper divisors (44206624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30640064 is a wasteful number, since it uses less digits than its factorization.

30640064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5293 (or 5283 counting only the distinct ones).

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

The square root of 30640064 is about 5535.3467822712. The cubic root of 30640064 is about 312.9175270194.

Adding to 30640064 its reverse (46004603), we get a palindrome (76644667).

The spelling of 30640064 in words is "thirty million, six hundred forty thousand, sixty-four".