133447140 has 36 divisors (see below), whose sum is σ = 404790204. Its totient is φ = 35585856.

The previous prime is 133447117. The next prime is 133447141. The reversal of 133447140 is 41744331.

It can be written as a sum of positive squares in 2 ways, for example, as 78004224 + 55442916 = 8832^2 + 7446^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (133447141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 370507 + ... + 370866.

Almost surely, 2^133447140 is an apocalyptic number.

133447140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133447140 is an abundant number, since it is smaller than the sum of its proper divisors (271343064).

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

133447140 is a wasteful number, since it uses less digits than its factorization.

133447140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741388 (or 741383 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 133447140 is about 11551.9323058958. The cubic root of 133447140 is about 511.0182654638.

The spelling of 133447140 in words is "one hundred thirty-three million, four hundred forty-seven thousand, one hundred forty".