64463872 has 88 divisors (see below), whose sum is σ = 144436320. Its totient is φ = 28508160.

The previous prime is 64463831. The next prime is 64463873. The reversal of 64463872 is 27836446.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (88).

It is not an unprimeable number, because it can be changed into a prime (64463873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 664528 + ... + 664624.

Almost surely, 2^64463872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64463872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72218160).

64463872 is an abundant number, since it is smaller than the sum of its proper divisors (79972448).

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

64463872 is a wasteful number, since it uses less digits than its factorization.

64463872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 169 counting only the distinct ones).

The product of its digits is 193536, while the sum is 40.

The square root of 64463872 is about 8028.9396560193. The cubic root of 64463872 is about 400.9640745340.

It can be divided in two parts, 644 and 63872, that added together give a square (64516 = 254²).

The spelling of 64463872 in words is "sixty-four million, four hundred sixty-three thousand, eight hundred seventy-two".