64843120 has 20 divisors (see below), whose sum is σ = 150760440. Its totient is φ = 25937216.

The previous prime is 64843091. The next prime is 64843133. The reversal of 64843120 is 2134846.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×64843120² = 8409260422668800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405190 + ... + 405349.

It is an arithmetic number, because the mean of its divisors is an integer number (7538022).

Almost surely, 2^64843120 is an apocalyptic number.

It is an amenable number.

64843120 is an abundant number, since it is smaller than the sum of its proper divisors (85917320).

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

64843120 is a wasteful number, since it uses less digits than its factorization.

64843120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810552 (or 810546 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 64843120 is about 8052.5225861217. The cubic root of 64843120 is about 401.7488427295.

Adding to 64843120 its reverse (2134846), we get a palindrome (66977966).

It can be divided in two parts, 6484 and 3120, that added together give a square (9604 = 98²).

The spelling of 64843120 in words is "sixty-four million, eight hundred forty-three thousand, one hundred twenty".