64448428 has 24 divisors (see below), whose sum is σ = 130276944. Its totient is φ = 27571200.

The previous prime is 64448401. The next prime is 64448453. The reversal of 64448428 is 82484446.

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 7 ways as a sum of consecutive naturals, for example, 42333 + ... + 43828.

It is an arithmetic number, because the mean of its divisors is an integer number (5428206).

Almost surely, 2^64448428 is an apocalyptic number.

64448428 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

64448428 is an abundant number, since it is smaller than the sum of its proper divisors (65828516).

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

64448428 is a wasteful number, since it uses less digits than its factorization.

64448428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86193 (or 86191 counting only the distinct ones).

The product of its digits is 196608, while the sum is 40.

The square root of 64448428 is about 8027.9778275728. The cubic root of 64448428 is about 400.9320515131.

The spelling of 64448428 in words is "sixty-four million, four hundred forty-eight thousand, four hundred twenty-eight".