64340280 has 96 divisors (see below), whose sum is σ = 210141360. Its totient is φ = 17072640.

The previous prime is 64340261. The next prime is 64340281. The reversal of 64340280 is 8204346.

64340280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64340281) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 112395 + ... + 112965.

Almost surely, 2^64340280 is an apocalyptic number.

64340280 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 64340280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105070680).

64340280 is an abundant number, since it is smaller than the sum of its proper divisors (145801080).

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

64340280 is a wasteful number, since it uses less digits than its factorization.

64340280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901 (or 894 counting only the distinct ones).

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

The square root of 64340280 is about 8021.2393057432. The cubic root of 64340280 is about 400.7076639577.

It can be divided in two parts, 64340 and 280, that added together give a triangular number (64620 = T₃₅₉).

The spelling of 64340280 in words is "sixty-four million, three hundred forty thousand, two hundred eighty".