64268840 has 32 divisors (see below), whose sum is σ = 153112680. Its totient is φ = 24195072.

The previous prime is 64268837. The next prime is 64268851. The reversal of 64268840 is 4886246.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 63712324 + 556516 = 7982^2 + 746^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64268794 and 64268803.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46577 + ... + 47936.

Almost surely, 2^64268840 is an apocalyptic number.

It is an amenable number.

64268840 is an abundant number, since it is smaller than the sum of its proper divisors (88843840).

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

64268840 is a wasteful number, since it uses less digits than its factorization.

64268840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94541 (or 94537 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 64268840 is about 8016.7848917131. The cubic root of 64268840 is about 400.5593009250.

The spelling of 64268840 in words is "sixty-four million, two hundred sixty-eight thousand, eight hundred forty".