64073140 has 12 divisors (see below), whose sum is σ = 134553636. Its totient is φ = 25629248.

The previous prime is 64073137. The next prime is 64073161. The reversal of 64073140 is 4137046.

It can be written as a sum of positive squares in 2 ways, for example, as 49617936 + 14455204 = 7044^2 + 3802^2 .

It is a congruent number.

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, 1601809 + ... + 1601848.

It is an arithmetic number, because the mean of its divisors is an integer number (11212803).

Almost surely, 2^64073140 is an apocalyptic number.

It is an amenable number.

64073140 is an abundant number, since it is smaller than the sum of its proper divisors (70480496).

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

64073140 is a wasteful number, since it uses less digits than its factorization.

64073140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3203666 (or 3203664 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 64073140 is about 8004.5699447253. The cubic root of 64073140 is about 400.1523169915.

The spelling of 64073140 in words is "sixty-four million, seventy-three thousand, one hundred forty".