133429928 has 16 divisors (see below), whose sum is σ = 258808500. Its totient is φ = 64414336.

The previous prime is 133429909. The next prime is 133429939. The reversal of 133429928 is 829924331.

It can be written as a sum of positive squares in 2 ways, for example, as 125933284 + 7496644 = 11222^2 + 2738^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287333 + ... + 287796.

Almost surely, 2^133429928 is an apocalyptic number.

It is an amenable number.

133429928 is a deficient number, since it is larger than the sum of its proper divisors (125378572).

133429928 is a wasteful number, since it uses less digits than its factorization.

133429928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575164 (or 575160 counting only the distinct ones).

The product of its digits is 93312, while the sum is 41.

The square root of 133429928 is about 11551.1872982824. The cubic root of 133429928 is about 510.9962941560.

The spelling of 133429928 in words is "one hundred thirty-three million, four hundred twenty-nine thousand, nine hundred twenty-eight".