64115140 has 24 divisors (see below), whose sum is σ = 135616320. Its totient is φ = 25460448.

The previous prime is 64115119. The next prime is 64115153. The reversal of 64115140 is 4151146.

It is a super-2 number, since 2×64115140² = 8221502354439200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8752 + ... + 14311.

It is an arithmetic number, because the mean of its divisors is an integer number (5650680).

Almost surely, 2^64115140 is an apocalyptic number.

It is an amenable number.

64115140 is an abundant number, since it is smaller than the sum of its proper divisors (71501180).

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

64115140 is a wasteful number, since it uses less digits than its factorization.

64115140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23211 (or 23209 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 64115140 is about 8007.1930162823. The cubic root of 64115140 is about 400.2397312936.

Adding to 64115140 its reverse (4151146), we get a palindrome (68266286).

The spelling of 64115140 in words is "sixty-four million, one hundred fifteen thousand, one hundred forty".