133728651 has 40 divisors (see below), whose sum is σ = 229532160. Its totient is φ = 76006512.

The previous prime is 133728649. The next prime is 133728659. The reversal of 133728651 is 156827331.

It is not a de Polignac number, because 133728651 - 2¹ = 133728649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133728659) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 128190 + ... + 129228.

It is an arithmetic number, because the mean of its divisors is an integer number (5738304).

Almost surely, 2^133728651 is an apocalyptic number.

133728651 is a deficient number, since it is larger than the sum of its proper divisors (95803509).

133728651 is a wasteful number, since it uses less digits than its factorization.

133728651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285 (or 1276 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 133728651 is about 11564.1104716273. The cubic root of 133728651 is about 511.3773495280.

The spelling of 133728651 in words is "one hundred thirty-three million, seven hundred twenty-eight thousand, six hundred fifty-one".