64068440 has 16 divisors (see below), whose sum is σ = 144154080. Its totient is φ = 25627360.

The previous prime is 64068419. The next prime is 64068443. The reversal of 64068440 is 4486046.

It is a junction number, because it is equal to n+sod(n) for n = 64068397 and 64068406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64068443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 800816 + ... + 800895.

It is an arithmetic number, because the mean of its divisors is an integer number (9009630).

Almost surely, 2^64068440 is an apocalyptic number.

It is an amenable number.

64068440 is an abundant number, since it is smaller than the sum of its proper divisors (80085640).

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

64068440 is a wasteful number, since it uses less digits than its factorization.

64068440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601722 (or 1601718 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 64068440 is about 8004.2763570481. The cubic root of 64068440 is about 400.1425325385.

The spelling of 64068440 in words is "sixty-four million, sixty-eight thousand, four hundred forty".