64127140 has 48 divisors (see below), whose sum is σ = 167900544. Its totient is φ = 19987200.

The previous prime is 64127131. The next prime is 64127177. The reversal of 64127140 is 4172146.

It is a super-2 number, since 2×64127140² = 8224580169159200, which contains 22 as substring.

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, 19281 + ... + 22360.

It is an arithmetic number, because the mean of its divisors is an integer number (3497928).

Almost surely, 2^64127140 is an apocalyptic number.

It is an amenable number.

64127140 is an abundant number, since it is smaller than the sum of its proper divisors (103773404).

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

64127140 is a wasteful number, since it uses less digits than its factorization.

64127140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41668 (or 41666 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 64127140 is about 8007.9423074845. The cubic root of 64127140 is about 400.2646997964.

Adding to 64127140 its reverse (4172146), we get a palindrome (68299286).

The spelling of 64127140 in words is "sixty-four million, one hundred twenty-seven thousand, one hundred forty".