64602140 has 48 divisors (see below), whose sum is σ = 144910080. Its totient is φ = 24138240.

The previous prime is 64602133. The next prime is 64602149. The reversal of 64602140 is 4120646.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64602149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16184 + ... + 19776.

It is an arithmetic number, because the mean of its divisors is an integer number (3018960).

Almost surely, 2^64602140 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 64602140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72455040).

64602140 is an abundant number, since it is smaller than the sum of its proper divisors (80307940).

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

64602140 is a wasteful number, since it uses less digits than its factorization.

64602140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3662 (or 3660 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 64602140 is about 8037.5456452825. The cubic root of 64602140 is about 401.2505446045.

Adding to 64602140 its reverse (4120646), we get a palindrome (68722786).

The spelling of 64602140 in words is "sixty-four million, six hundred two thousand, one hundred forty".