133634428 has 12 divisors (see below), whose sum is σ = 241404352. Its totient is φ = 64661760.

The previous prime is 133634401. The next prime is 133634437. The reversal of 133634428 is 824436331.

It is a junction number, because it is equal to n+sod(n) for n = 133634393 and 133634402.

It is a congruent number.

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, 538725 + ... + 538972.

Almost surely, 2^133634428 is an apocalyptic number.

It is an amenable number.

133634428 is a deficient number, since it is larger than the sum of its proper divisors (107769924).

133634428 is a wasteful number, since it uses less digits than its factorization.

133634428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077732 (or 1077730 counting only the distinct ones).

The product of its digits is 41472, while the sum is 34.

The square root of 133634428 is about 11560.0358130933. The cubic root of 133634428 is about 511.2572186298.

The spelling of 133634428 in words is "one hundred thirty-three million, six hundred thirty-four thousand, four hundred twenty-eight".