133639648 has 12 divisors (see below), whose sum is σ = 263103120. Its totient is φ = 66819808.

The previous prime is 133639633. The next prime is 133639651. The reversal of 133639648 is 846936331.

It is a congruent 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 as a sum of consecutive naturals, namely, 2088088 + ... + 2088151.

It is an arithmetic number, because the mean of its divisors is an integer number (21925260).

Almost surely, 2^133639648 is an apocalyptic number.

It is an amenable number.

133639648 is a deficient number, since it is larger than the sum of its proper divisors (129463472).

133639648 is an equidigital number, since it uses as much as digits as its factorization.

133639648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4176249 (or 4176241 counting only the distinct ones).

The product of its digits is 279936, while the sum is 43.

The square root of 133639648 is about 11560.2615887358. The cubic root of 133639648 is about 511.2638754172.

The spelling of 133639648 in words is "one hundred thirty-three million, six hundred thirty-nine thousand, six hundred forty-eight".