64449800 has 24 divisors (see below), whose sum is σ = 149846250. Its totient is φ = 25779840.

The previous prime is 64449799. The next prime is 64449821. The reversal of 64449800 is 894446.

It can be written as a sum of positive squares in 3 ways, for example, as 58583716 + 5866084 = 7654^2 + 2422^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 160925 + ... + 161324.

Almost surely, 2^64449800 is an apocalyptic number.

It is an amenable number.

64449800 is an abundant number, since it is smaller than the sum of its proper divisors (85396450).

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

64449800 is a wasteful number, since it uses less digits than its factorization.

64449800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322265 (or 322256 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 64449800 is about 8028.0632782758. The cubic root of 64449800 is about 400.9348965521.

The spelling of 64449800 in words is "sixty-four million, four hundred forty-nine thousand, eight hundred".