133553448 has 80 divisors (see below), whose sum is σ = 427526880. Its totient is φ = 38156832.

The previous prime is 133553447. The next prime is 133553467. The reversal of 133553448 is 844355331.

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

It is not an unprimeable number, because it can be changed into a prime (133553443) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 10186 + ... + 19257.

It is an arithmetic number, because the mean of its divisors is an integer number (5344086).

Almost surely, 2^133553448 is an apocalyptic number.

133553448 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

133553448 is an abundant number, since it is smaller than the sum of its proper divisors (293973432).

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

133553448 is a wasteful number, since it uses less digits than its factorization.

133553448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29468 (or 29455 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 133553448 is about 11556.5326980025. The cubic root of 133553448 is about 511.1539269460.

The spelling of 133553448 in words is "one hundred thirty-three million, five hundred fifty-three thousand, four hundred forty-eight".