133553880 has 64 divisors (see below), whose sum is σ = 445183200. Its totient is φ = 35614080.

The previous prime is 133553873. The next prime is 133553881. The reversal of 133553880 is 88355331.

133553880 is a `hidden beast` number, since 13 + 35 + 538 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133553881) by changing a digit.

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, 60751 + ... + 62910.

Almost surely, 2^133553880 is an apocalyptic number.

133553880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133553880 is an abundant number, since it is smaller than the sum of its proper divisors (311629320).

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

133553880 is a wasteful number, since it uses less digits than its factorization.

133553880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123681 (or 123671 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 133553880 is about 11556.5513887145. The cubic root of 133553880 is about 511.1544780818.

The spelling of 133553880 in words is "one hundred thirty-three million, five hundred fifty-three thousand, eight hundred eighty".