64114440 has 128 divisors (see below), whose sum is σ = 210349440. Its totient is φ = 15538176.

The previous prime is 64114433. The next prime is 64114483. The reversal of 64114440 is 4441146.

It is a super-2 number, since 2×64114440² = 8221322833027200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 64114440.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113599 + ... + 114161.

It is an arithmetic number, because the mean of its divisors is an integer number (1643355).

Almost surely, 2^64114440 is an apocalyptic number.

64114440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64114440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105174720).

64114440 is an abundant number, since it is smaller than the sum of its proper divisors (146235000).

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

64114440 is a wasteful number, since it uses less digits than its factorization.

64114440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663 (or 659 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 64114440 is about 8007.1493054645. The cubic root of 64114440 is about 400.2382747014.

Adding to 64114440 its reverse (4441146), we get a palindrome (68555586).

The spelling of 64114440 in words is "sixty-four million, one hundred fourteen thousand, four hundred forty".