64445000 has 40 divisors (see below), whose sum is σ = 151006350. Its totient is φ = 25776000.

The previous prime is 64444997. The next prime is 64445027. The reversal of 64445000 is 54446.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 2256004 + 62188996 = 1502^2 + 7886^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1445 + ... + 11444.

Almost surely, 2^64445000 is an apocalyptic number.

It is an amenable number.

64445000 is an abundant number, since it is smaller than the sum of its proper divisors (86561350).

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

64445000 is a wasteful number, since it uses less digits than its factorization.

64445000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12915 (or 12896 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 64445000 is about 8027.7643214036. The cubic root of 64445000 is about 400.9249428864.

Adding to 64445000 its reverse (54446), we get a palindrome (64499446).

The spelling of 64445000 in words is "sixty-four million, four hundred forty-five thousand".