133988408 has 8 divisors (see below), whose sum is σ = 251228280. Its totient is φ = 66994200.

The previous prime is 133988377. The next prime is 133988411. The reversal of 133988408 is 804889331.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8374268 + ... + 8374283.

It is an arithmetic number, because the mean of its divisors is an integer number (31403535).

Almost surely, 2^133988408 is an apocalyptic number.

It is an amenable number.

133988408 is a deficient number, since it is larger than the sum of its proper divisors (117239872).

133988408 is a wasteful number, since it uses less digits than its factorization.

133988408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16748557 (or 16748553 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 133988408 is about 11575.3361938218. The cubic root of 133988408 is about 511.7082383131.

The spelling of 133988408 in words is "one hundred thirty-three million, nine hundred eighty-eight thousand, four hundred eight".