133693632 has 56 divisors (see below), whose sum is σ = 393039600. Its totient is φ = 44563968.

The previous prime is 133693631. The next prime is 133693649. The reversal of 133693632 is 236396331.

133693632 is a `hidden beast` number, since 13 + 3 + 6 + 9 + 3 + 632 = 666.

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

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (133693631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36957 + ... + 40412.

Almost surely, 2^133693632 is an apocalyptic number.

133693632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

133693632 is an abundant number, since it is smaller than the sum of its proper divisors (259345968).

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

133693632 is an equidigital number, since it uses as much as digits as its factorization.

133693632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77390 (or 77374 counting only the distinct ones).

The product of its digits is 52488, while the sum is 36.

The square root of 133693632 is about 11562.5962482481. The cubic root of 133693632 is about 511.3327081674.

The spelling of 133693632 in words is "one hundred thirty-three million, six hundred ninety-three thousand, six hundred thirty-two".