64943040 has 112 divisors (see below), whose sum is σ = 209763360. Its totient is φ = 17018880.

The previous prime is 64943027. The next prime is 64943041. The reversal of 64943040 is 4034946.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 64942989 and 64943007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64943041) 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, 58006 + ... + 59114.

Almost surely, 2^64943040 is an apocalyptic number.

64943040 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 64943040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104881680).

64943040 is an abundant number, since it is smaller than the sum of its proper divisors (144820320).

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

64943040 is a wasteful number, since it uses less digits than its factorization.

64943040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190 (or 1180 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 64943040 is about 8058.7244648269. The cubic root of 64943040 is about 401.9550951054.

Adding to 64943040 its reverse (4034946), we get a palindrome (68977986).

The spelling of 64943040 in words is "sixty-four million, nine hundred forty-three thousand, forty".