64380420 has 144 divisors (see below), whose sum is σ = 218312640. Its totient is φ = 15831936.

The previous prime is 64380403. The next prime is 64380431. The reversal of 64380420 is 2408346.

64380420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 62671 + ... + 63689.

It is an arithmetic number, because the mean of its divisors is an integer number (1516060).

Almost surely, 2^64380420 is an apocalyptic number.

64380420 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 64380420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109156320).

64380420 is an abundant number, since it is smaller than the sum of its proper divisors (153932220).

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

64380420 is a wasteful number, since it uses less digits than its factorization.

64380420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056 (or 1042 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 64380420 is about 8023.7410227400. The cubic root of 64380420 is about 400.7909765260.

Adding to 64380420 its reverse (2408346), we get a palindrome (66788766).

The spelling of 64380420 in words is "sixty-four million, three hundred eighty thousand, four hundred twenty".