64223760 has 80 divisors (see below), whose sum is σ = 201951360. Its totient is φ = 16880640.

The previous prime is 64223729. The next prime is 64223767. The reversal of 64223760 is 6732246.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is not an unprimeable number, because it can be changed into a prime (64223767) 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, 15156 + ... + 18924.

It is an arithmetic number, because the mean of its divisors is an integer number (2524392).

Almost surely, 2^64223760 is an apocalyptic number.

64223760 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 64223760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100975680).

64223760 is an abundant number, since it is smaller than the sum of its proper divisors (137727600).

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

64223760 is a wasteful number, since it uses less digits than its factorization.

64223760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3856 (or 3850 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 64223760 is about 8013.9727975580. The cubic root of 64223760 is about 400.4656244411.

The spelling of 64223760 in words is "sixty-four million, two hundred twenty-three thousand, seven hundred sixty".