64389120 has 128 divisors (see below), whose sum is σ = 207614880. Its totient is φ = 17039360.

The previous prime is 64389089. The next prime is 64389137. The reversal of 64389120 is 2198346.

It is a tau number, because it is divible by the number of its divisors (128).

It is a zygodrome in base 4.

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, 491455 + ... + 491585.

Almost surely, 2^64389120 is an apocalyptic number.

64389120 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 64389120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103807440).

64389120 is an abundant number, since it is smaller than the sum of its proper divisors (143225760).

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

64389120 is an equidigital number, since it uses as much as digits as its factorization.

64389120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 64389120 is about 8024.2831455526. The cubic root of 64389120 is about 400.8090292427.

The spelling of 64389120 in words is "sixty-four million, three hundred eighty-nine thousand, one hundred twenty".