133357780 has 12 divisors (see below), whose sum is σ = 280051380. Its totient is φ = 53343104.

The previous prime is 133357739. The next prime is 133357781. The reversal of 133357780 is 87753331.

It can be written as a sum of positive squares in 2 ways, for example, as 94245264 + 39112516 = 9708^2 + 6254^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133357781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3333925 + ... + 3333964.

It is an arithmetic number, because the mean of its divisors is an integer number (23337615).

Almost surely, 2^133357780 is an apocalyptic number.

133357780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133357780 is an abundant number, since it is smaller than the sum of its proper divisors (146693600).

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

133357780 is a wasteful number, since it uses less digits than its factorization.

133357780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6667898 (or 6667896 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 133357780 is about 11548.0639069932. The cubic root of 133357780 is about 510.9041758731.

It can be divided in two parts, 13335 and 7780, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 133357780 in words is "one hundred thirty-three million, three hundred fifty-seven thousand, seven hundred eighty".