133690392 has 64 divisors (see below), whose sum is σ = 405129600. Its totient is φ = 40511520.

The previous prime is 133690391. The next prime is 133690409. The reversal of 133690392 is 293096331.

It is a happy number.

It is a super-2 number, since 2×133690392² = 35746241826227328, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133690391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25758 + ... + 30509.

It is an arithmetic number, because the mean of its divisors is an integer number (6330150).

Almost surely, 2^133690392 is an apocalyptic number.

133690392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

133690392 is an abundant number, since it is smaller than the sum of its proper divisors (271439208).

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

133690392 is a wasteful number, since it uses less digits than its factorization.

133690392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56293 (or 56283 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 36.

The square root of 133690392 is about 11562.4561404574. The cubic root of 133690392 is about 511.3285775011.

The spelling of 133690392 in words is "one hundred thirty-three million, six hundred ninety thousand, three hundred ninety-two".