133704428 has 48 divisors (see below), whose sum is σ = 286868736. Its totient is φ = 53655360.

The previous prime is 133704409. The next prime is 133704469. The reversal of 133704428 is 824407331.

It is a junction number, because it is equal to n+sod(n) for n = 133704394 and 133704403.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8075 + ... + 18237.

It is an arithmetic number, because the mean of its divisors is an integer number (5976432).

Almost surely, 2^133704428 is an apocalyptic number.

It is an amenable number.

133704428 is an abundant number, since it is smaller than the sum of its proper divisors (153164308).

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

133704428 is a wasteful number, since it uses less digits than its factorization.

133704428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10214 (or 10212 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 133704428 is about 11563.0630889916. The cubic root of 133704428 is about 511.3464714740.

The spelling of 133704428 in words is "one hundred thirty-three million, seven hundred four thousand, four hundred twenty-eight".