60640640 has 64 divisors (see below), whose sum is σ = 148569120. Its totient is φ = 23654400.

The previous prime is 60640633. The next prime is 60640651. The reversal of 60640640 is 4604606.

It is a tau number, because it is divible by the number of its divisors (64).

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, 25085 + ... + 27395.

Almost surely, 2^60640640 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 60640640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74284560).

60640640 is an abundant number, since it is smaller than the sum of its proper divisors (87928480).

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

60640640 is a wasteful number, since it uses less digits than its factorization.

60640640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2371 (or 2359 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 60640640 is about 7787.2100267040. The cubic root of 60640640 is about 392.8751791483.

The spelling of 60640640 in words is "sixty million, six hundred forty thousand, six hundred forty".