133103928 has 16 divisors (see below), whose sum is σ = 332759880. Its totient is φ = 44367968.

The previous prime is 133103923. The next prime is 133103969. The reversal of 133103928 is 829301331.

It is a junction number, because it is equal to n+sod(n) for n = 133103895 and 133103904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133103923) 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, 2772975 + ... + 2773022.

Almost surely, 2^133103928 is an apocalyptic number.

It is an amenable number.

133103928 is an abundant number, since it is smaller than the sum of its proper divisors (199655952).

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

133103928 is a wasteful number, since it uses less digits than its factorization.

133103928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5546006 (or 5546002 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 133103928 is about 11537.0675650271. The cubic root of 133103928 is about 510.5797942819.

The spelling of 133103928 in words is "one hundred thirty-three million, one hundred three thousand, nine hundred twenty-eight".