133643856 has 40 divisors (see below), whose sum is σ = 348486624. Its totient is φ = 44129920.

The previous prime is 133643843. The next prime is 133643897. The reversal of 133643856 is 658346331.

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 in 7 ways as a sum of consecutive naturals, for example, 7875 + ... + 18146.

Almost surely, 2^133643856 is an apocalyptic number.

133643856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

133643856 is an abundant number, since it is smaller than the sum of its proper divisors (214842768).

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

133643856 is a wasteful number, since it uses less digits than its factorization.

133643856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26139 (or 26133 counting only the distinct ones).

The product of its digits is 155520, while the sum is 39.

The square root of 133643856 is about 11560.4435901050. The cubic root of 133643856 is about 511.2692415289.

The spelling of 133643856 in words is "one hundred thirty-three million, six hundred forty-three thousand, eight hundred fifty-six".