64481238 has 32 divisors (see below), whose sum is σ = 151722720. Its totient is φ = 20229120.

The previous prime is 64481191. The next prime is 64481251. The reversal of 64481238 is 83218446.

64481238 is a `hidden beast` number, since 644 + 8 + 1 + 2 + 3 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34203 + ... + 36038.

It is an arithmetic number, because the mean of its divisors is an integer number (4741335).

Almost surely, 2^64481238 is an apocalyptic number.

64481238 is an abundant number, since it is smaller than the sum of its proper divisors (87241482).

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

64481238 is a wasteful number, since it uses less digits than its factorization.

64481238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70269 (or 70263 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 64481238 is about 8030.0210460496. The cubic root of 64481238 is about 401.0000766993. Note that the first 4 decimals are identical.

The spelling of 64481238 in words is "sixty-four million, four hundred eighty-one thousand, two hundred thirty-eight".