133261980 has 48 divisors (see below), whose sum is σ = 395085600. Its totient is φ = 33445888.

The previous prime is 133261979. The next prime is 133261987. The reversal of 133261980 is 89162331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133261987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64305 + ... + 66344.

It is an arithmetic number, because the mean of its divisors is an integer number (8230950).

Almost surely, 2^133261980 is an apocalyptic number.

133261980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133261980 is an abundant number, since it is smaller than the sum of its proper divisors (261823620).

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

133261980 is a wasteful number, since it uses less digits than its factorization.

133261980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130678 (or 130676 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 133261980 is about 11543.9152803544. The cubic root of 133261980 is about 510.7818074473.

The spelling of 133261980 in words is "one hundred thirty-three million, two hundred sixty-one thousand, nine hundred eighty".