64073540 has 12 divisors (see below), whose sum is σ = 134554476. Its totient is φ = 25629408.

The previous prime is 64073521. The next prime is 64073551. The reversal of 64073540 is 4537046.

It can be written as a sum of positive squares in 2 ways, for example, as 14258176 + 49815364 = 3776^2 + 7058^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1601819 + ... + 1601858.

It is an arithmetic number, because the mean of its divisors is an integer number (11212873).

Almost surely, 2^64073540 is an apocalyptic number.

It is an amenable number.

64073540 is an abundant number, since it is smaller than the sum of its proper divisors (70480936).

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

64073540 is a wasteful number, since it uses less digits than its factorization.

64073540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3203686 (or 3203684 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 64073540 is about 8004.5949304134. The cubic root of 64073540 is about 400.1531496888.

The spelling of 64073540 in words is "sixty-four million, seventy-three thousand, five hundred forty".