64445970 has 16 divisors (see below), whose sum is σ = 154670400. Its totient is φ = 17185584.

The previous prime is 64445939. The next prime is 64445987. The reversal of 64445970 is 7954446.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1074070 + ... + 1074129.

It is an arithmetic number, because the mean of its divisors is an integer number (9666900).

Almost surely, 2^64445970 is an apocalyptic number.

64445970 is an abundant number, since it is smaller than the sum of its proper divisors (90224430).

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

64445970 is a wasteful number, since it uses less digits than its factorization.

64445970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2148209.

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 64445970 is about 8027.8247365024. The cubic root of 64445970 is about 400.9269543962.

The spelling of 64445970 in words is "sixty-four million, four hundred forty-five thousand, nine hundred seventy".