133255408 has 80 divisors (see below), whose sum is σ = 306230400. Its totient is φ = 55376640.

The previous prime is 133255403. The next prime is 133255411. The reversal of 133255408 is 804552331.

It is a super-2 number, since 2×133255408² = 35514007522492928, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 133255408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133255403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317823 + ... + 318241.

It is an arithmetic number, because the mean of its divisors is an integer number (3827880).

Almost surely, 2^133255408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133255408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153115200).

133255408 is an abundant number, since it is smaller than the sum of its proper divisors (172974992).

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

133255408 is a wasteful number, since it uses less digits than its factorization.

133255408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590 (or 584 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 133255408 is about 11543.6306247211. The cubic root of 133255408 is about 510.7734106707.

The spelling of 133255408 in words is "one hundred thirty-three million, two hundred fifty-five thousand, four hundred eight".