64043040 has 96 divisors (see below), whose sum is σ = 210542976. Its totient is φ = 16332800.

The previous prime is 64043011. The next prime is 64043047. The reversal of 64043040 is 4034046.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 64042998 and 64043016.

It is not an unprimeable number, because it can be changed into a prime (64043047) 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, 8140 + ... + 13940.

It is an arithmetic number, because the mean of its divisors is an integer number (2193156).

Almost surely, 2^64043040 is an apocalyptic number.

64043040 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 64043040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105271488).

64043040 is an abundant number, since it is smaller than the sum of its proper divisors (146499936).

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

64043040 is a wasteful number, since it uses less digits than its factorization.

64043040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5842 (or 5834 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 64043040 is about 8002.6895478958. The cubic root of 64043040 is about 400.0896465739.

Adding to 64043040 its reverse (4034046), we get a palindrome (68077086).

The spelling of 64043040 in words is "sixty-four million, forty-three thousand, forty".