133275840 has 56 divisors (see below), whose sum is σ = 423153840. Its totient is φ = 35539968.

The previous prime is 133275827. The next prime is 133275847. The reversal of 133275840 is 48572331.

It is not an unprimeable number, because it can be changed into a prime (133275847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68455 + ... + 70374.

Almost surely, 2^133275840 is an apocalyptic number.

133275840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133275840 is an abundant number, since it is smaller than the sum of its proper divisors (289878000).

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

133275840 is a wasteful number, since it uses less digits than its factorization.

133275840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138849 (or 138839 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 133275840 is about 11544.5155810021. The cubic root of 133275840 is about 510.7995148995.

The spelling of 133275840 in words is "one hundred thirty-three million, two hundred seventy-five thousand, eight hundred forty".