133338388 has 6 divisors (see below), whose sum is σ = 233342186. Its totient is φ = 66669192.

The previous prime is 133338379. The next prime is 133338427. The reversal of 133338388 is 883833331.

It can be written as a sum of positive squares in only one way, i.e., 130233744 + 3104644 = 11412^2 + 1762^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 133338388.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16667295 + ... + 16667302.

Almost surely, 2^133338388 is an apocalyptic number.

It is an amenable number.

133338388 is a deficient number, since it is larger than the sum of its proper divisors (100003798).

133338388 is a wasteful number, since it uses less digits than its factorization.

133338388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33334601 (or 33334599 counting only the distinct ones).

The product of its digits is 124416, while the sum is 40.

The square root of 133338388 is about 11547.2242552052. The cubic root of 133338388 is about 510.8794105787.

The spelling of 133338388 in words is "one hundred thirty-three million, three hundred thirty-eight thousand, three hundred eighty-eight".