133256380 has 24 divisors (see below), whose sum is σ = 282319632. Its totient is φ = 52829952.

The previous prime is 133256377. The next prime is 133256393. The reversal of 133256380 is 83652331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27222 + ... + 31741.

It is an arithmetic number, because the mean of its divisors is an integer number (11763318).

Almost surely, 2^133256380 is an apocalyptic number.

133256380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133256380 is an abundant number, since it is smaller than the sum of its proper divisors (149063252).

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

133256380 is a wasteful number, since it uses less digits than its factorization.

133256380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59085 (or 59083 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 133256380 is about 11543.6727257836. The cubic root of 133256380 is about 510.7746525729.

The spelling of 133256380 in words is "one hundred thirty-three million, two hundred fifty-six thousand, three hundred eighty".