133238138 has 16 divisors (see below), whose sum is σ = 222666624. Its totient is φ = 59273760.

The previous prime is 133238087. The next prime is 133238141. The reversal of 133238138 is 831832331.

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, 63395 + ... + 65462.

It is an arithmetic number, because the mean of its divisors is an integer number (13916664).

Almost surely, 2^133238138 is an apocalyptic number.

133238138 is a deficient number, since it is larger than the sum of its proper divisors (89428486).

133238138 is a wasteful number, since it uses less digits than its factorization.

133238138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128917.

The product of its digits is 10368, while the sum is 32.

The square root of 133238138 is about 11542.8825689253. The cubic root of 133238138 is about 510.7513441794.

The spelling of 133238138 in words is "one hundred thirty-three million, two hundred thirty-eight thousand, one hundred thirty-eight".