133220976 has 160 divisors (see below), whose sum is σ = 422972928. Its totient is φ = 35266560.

The previous prime is 133220963. The next prime is 133220977. The reversal of 133220976 is 679022331.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133220977) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 473956 + ... + 474236.

Almost surely, 2^133220976 is an apocalyptic number.

133220976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133220976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211486464).

133220976 is an abundant number, since it is smaller than the sum of its proper divisors (289751952).

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

133220976 is a wasteful number, since it uses less digits than its factorization.

133220976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 33.

The square root of 133220976 is about 11542.1391431571. The cubic root of 133220976 is about 510.7294137945.

The spelling of 133220976 in words is "one hundred thirty-three million, two hundred twenty thousand, nine hundred seventy-six".