133066428 has 48 divisors (see below), whose sum is σ = 340091136. Its totient is φ = 40159360.

The previous prime is 133066403. The next prime is 133066433. The reversal of 133066428 is 824660331.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32800 + ... + 36632.

It is an arithmetic number, because the mean of its divisors is an integer number (7085232).

Almost surely, 2^133066428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133066428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170045568).

133066428 is an abundant number, since it is smaller than the sum of its proper divisors (207024708).

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

133066428 is a wasteful number, since it uses less digits than its factorization.

133066428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4114 (or 4112 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 133066428 is about 11535.4422542007. The cubic root of 133066428 is about 510.5318404237.

The spelling of 133066428 in words is "one hundred thirty-three million, sixty-six thousand, four hundred twenty-eight".