64064140 has 48 divisors (see below), whose sum is σ = 157518144. Its totient is φ = 21427200.

The previous prime is 64064123. The next prime is 64064141. The reversal of 64064140 is 4146046.

64064140 = T₁₁₃ + T₁₁₄ + ... + T₇₂₇.

It is not an unprimeable number, because it can be changed into a prime (64064141) 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, 160 + ... + 11320.

It is an arithmetic number, because the mean of its divisors is an integer number (3281628).

Almost surely, 2^64064140 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 64064140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78759072).

64064140 is an abundant number, since it is smaller than the sum of its proper divisors (93454004).

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

64064140 is a wasteful number, since it uses less digits than its factorization.

64064140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11218 (or 11216 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 64064140 is about 8004.0077461232. The cubic root of 64064140 is about 400.1335803857.

The spelling of 64064140 in words is "sixty-four million, sixty-four thousand, one hundred forty".