133690608 has 40 divisors (see below), whose sum is σ = 383742800. Its totient is φ = 44563392.

The previous prime is 133690577. The next prime is 133690619. The reversal of 133690608 is 806096331.

It is a happy number.

133690608 is a `hidden beast` number, since 13 + 36 + 9 + 0 + 608 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154303 + ... + 155166.

It is an arithmetic number, because the mean of its divisors is an integer number (9593570).

Almost surely, 2^133690608 is an apocalyptic number.

133690608 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

133690608 is an abundant number, since it is smaller than the sum of its proper divisors (250052192).

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

133690608 is a wasteful number, since it uses less digits than its factorization.

133690608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309486 (or 309474 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 133690608 is about 11562.4654810296. The cubic root of 133690608 is about 511.3288528809.

The spelling of 133690608 in words is "one hundred thirty-three million, six hundred ninety thousand, six hundred eight".