64453970 has 32 divisors (see below), whose sum is σ = 140393088. Its totient is φ = 20798208.

The previous prime is 64453951. The next prime is 64453999. The reversal of 64453970 is 7935446.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 25892 + ... + 28271.

It is an arithmetic number, because the mean of its divisors is an integer number (4387284).

Almost surely, 2^64453970 is an apocalyptic number.

64453970 is an abundant number, since it is smaller than the sum of its proper divisors (75939118).

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

64453970 is a wasteful number, since it uses less digits than its factorization.

64453970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54194.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 64453970 is about 8028.3229880218. The cubic root of 64453970 is about 400.9435433979.

The spelling of 64453970 in words is "sixty-four million, four hundred fifty-three thousand, nine hundred seventy".