64350840 has 64 divisors (see below), whose sum is σ = 193881600. Its totient is φ = 17086592.

The previous prime is 64350821. The next prime is 64350857. The reversal of 64350840 is 4805346.

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

It is a junction number, because it is equal to n+sod(n) for n = 64350798 and 64350807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30541 + ... + 32579.

It is an arithmetic number, because the mean of its divisors is an integer number (3029400).

Almost surely, 2^64350840 is an apocalyptic number.

64350840 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 64350840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96940800).

64350840 is an abundant number, since it is smaller than the sum of its proper divisors (129530760).

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

64350840 is a wasteful number, since it uses less digits than its factorization.

64350840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316 (or 2312 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 64350840 is about 8021.8975311331. The cubic root of 64350840 is about 400.7295851215.

The spelling of 64350840 in words is "sixty-four million, three hundred fifty thousand, eight hundred forty".