64642300 has 18 divisors (see below), whose sum is σ = 140274008. Its totient is φ = 25856880.

The previous prime is 64642297. The next prime is 64642301. The reversal of 64642300 is 324646.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64642301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 323112 + ... + 323311.

Almost surely, 2^64642300 is an apocalyptic number.

It is an amenable number.

64642300 is an abundant number, since it is smaller than the sum of its proper divisors (75631708).

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

64642300 is a wasteful number, since it uses less digits than its factorization.

64642300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646437 (or 646430 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 64642300 is about 8040.0435322205. The cubic root of 64642300 is about 401.3336733465. Note that the first 3 decimals are identical.

Adding to 64642300 its reverse (324646), we get a palindrome (64966946).

The spelling of 64642300 in words is "sixty-four million, six hundred forty-two thousand, three hundred".