133273644 has 48 divisors (see below), whose sum is σ = 355977216. Its totient is φ = 38016000.

The previous prime is 133273643. The next prime is 133273663. The reversal of 133273644 is 446372331.

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

It is not an unprimeable number, because it can be changed into a prime (133273643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82444 + ... + 84044.

It is an arithmetic number, because the mean of its divisors is an integer number (7416192).

Almost surely, 2^133273644 is an apocalyptic number.

133273644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

133273644 is an abundant number, since it is smaller than the sum of its proper divisors (222703572).

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

133273644 is a wasteful number, since it uses less digits than its factorization.

133273644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2606 (or 2604 counting only the distinct ones).

The product of its digits is 36288, while the sum is 33.

The square root of 133273644 is about 11544.4204705130. The cubic root of 133273644 is about 510.7967093850.

The spelling of 133273644 in words is "one hundred thirty-three million, two hundred seventy-three thousand, six hundred forty-four".