64144700 has 54 divisors (see below), whose sum is σ = 146120856. Its totient is φ = 24395360.

The previous prime is 64144699. The next prime is 64144709. The reversal of 64144700 is 744146.

It is a super-2 number, since 2×64144700² = 8229085076180000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 64144700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64144709) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 384017 + ... + 384183.

Almost surely, 2^64144700 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 64144700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73060428).

64144700 is an abundant number, since it is smaller than the sum of its proper divisors (81976156).

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

64144700 is a wasteful number, since it uses less digits than its factorization.

64144700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 64144700 is about 8009.0386439322. The cubic root of 64144700 is about 400.3012314255.

Adding to 64144700 its reverse (744146), we get a palindrome (64888846).

The spelling of 64144700 in words is "sixty-four million, one hundred forty-four thousand, seven hundred".