64763888 has 40 divisors (see below), whose sum is σ = 146344800. Its totient is φ = 27753600.

The previous prime is 64763869. The next prime is 64763903. The reversal of 64763888 is 88836746.

It is a happy number.

It is a super-4 number, since 4×64763888⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

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, 413 + ... + 11388.

It is an arithmetic number, because the mean of its divisors is an integer number (3658620).

Almost surely, 2^64763888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64763888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73172400).

64763888 is an abundant number, since it is smaller than the sum of its proper divisors (81580912).

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

64763888 is a wasteful number, since it uses less digits than its factorization.

64763888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11830 (or 11810 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 50.

The square root of 64763888 is about 8047.6013817783. The cubic root of 64763888 is about 401.5851433370.

The spelling of 64763888 in words is "sixty-four million, seven hundred sixty-three thousand, eight hundred eighty-eight".