133764220 has 12 divisors (see below), whose sum is σ = 280904904. Its totient is φ = 53505680.

The previous prime is 133764193. The next prime is 133764223. The reversal of 133764220 is 22467331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133764223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3344086 + ... + 3344125.

It is an arithmetic number, because the mean of its divisors is an integer number (23408742).

Almost surely, 2^133764220 is an apocalyptic number.

133764220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133764220 is an abundant number, since it is smaller than the sum of its proper divisors (147140684).

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

133764220 is a wasteful number, since it uses less digits than its factorization.

133764220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6688220 (or 6688218 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 133764220 is about 11565.6482740917. The cubic root of 133764220 is about 511.4226840379.

The spelling of 133764220 in words is "one hundred thirty-three million, seven hundred sixty-four thousand, two hundred twenty".