64441500 has 48 divisors (see below), whose sum is σ = 187658016. Its totient is φ = 17184000.

The previous prime is 64441493. The next prime is 64441501. The reversal of 64441500 is 514446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64441501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19981 + ... + 22980.

It is an arithmetic number, because the mean of its divisors is an integer number (3909542).

Almost surely, 2^64441500 is an apocalyptic number.

64441500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64441500 is an abundant number, since it is smaller than the sum of its proper divisors (123216516).

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

64441500 is a wasteful number, since it uses less digits than its factorization.

64441500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42983 (or 42971 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 64441500 is about 8027.5463249987. The cubic root of 64441500 is about 400.9176846936.

Adding to 64441500 its reverse (514446), we get a palindrome (64955946).

The spelling of 64441500 in words is "sixty-four million, four hundred forty-one thousand, five hundred".