133888 has 18 divisors (see below), whose sum is σ = 267764. Its totient is φ = 66816.

The previous prime is 133877. The next prime is 133919. The reversal of 133888 is 888331.

It is a plaindrome in base 10.

It is an unprimeable number.

133888 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6 + ... + 517.

2¹³³⁸⁸⁸ is an apocalyptic number.

It is an amenable number.

133888 is a deficient number, since it is larger than the sum of its proper divisors (133876).

133888 is an frugal number, since it uses more digits than its factorization.

133888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539 (or 525 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 133888 is about 365.9070920329. The cubic root of 133888 is about 51.1580385361.

The spelling of 133888 in words is "one hundred thirty-three thousand, eight hundred eighty-eight".