64020120 has 128 divisors (see below), whose sum is σ = 207187200. Its totient is φ = 15773184.

The previous prime is 64020119. The next prime is 64020127. The reversal of 64020120 is 2102046.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 64020120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64020127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97714 + ... + 98366.

It is an arithmetic number, because the mean of its divisors is an integer number (1618650).

Almost surely, 2^64020120 is an apocalyptic number.

64020120 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 64020120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103593600).

64020120 is an abundant number, since it is smaller than the sum of its proper divisors (143167080).

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

64020120 is a wasteful number, since it uses less digits than its factorization.

64020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729 (or 725 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 64020120 is about 8001.2574011839. The cubic root of 64020120 is about 400.0419122749.

Adding to 64020120 its reverse (2102046), we get a palindrome (66122166).

The spelling of 64020120 in words is "sixty-four million, twenty thousand, one hundred twenty".