64500740 has 48 divisors (see below), whose sum is σ = 142128000. Its totient is φ = 24541440.

The previous prime is 64500713. The next prime is 64500757. The reversal of 64500740 is 4700546.

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, 129011 + ... + 129509.

It is an arithmetic number, because the mean of its divisors is an integer number (2961000).

Almost surely, 2^64500740 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 64500740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71064000).

64500740 is an abundant number, since it is smaller than the sum of its proper divisors (77627260).

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

64500740 is a wasteful number, since it uses less digits than its factorization.

64500740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812 (or 810 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 64500740 is about 8031.2352723600. The cubic root of 64500740 is about 401.0404993890.

The spelling of 64500740 in words is "sixty-four million, five hundred thousand, seven hundred forty".