133330640 has 40 divisors (see below), whose sum is σ = 310480128. Its totient is φ = 53248640.

The previous prime is 133330583. The next prime is 133330651. The reversal of 133330640 is 46033331.

133330640 = 269² + 270² + ... + 748².

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87485 + ... + 88995.

Almost surely, 2^133330640 is an apocalyptic number.

133330640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133330640 is an abundant number, since it is smaller than the sum of its proper divisors (177149488).

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

133330640 is a wasteful number, since it uses less digits than its factorization.

133330640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2627 (or 2621 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 23.

The square root of 133330640 is about 11546.8887584492. Note that the first 3 decimals coincide. The cubic root of 133330640 is about 510.8695150280.

Adding to 133330640 its reverse (46033331), we get a palindrome (179363971).

The spelling of 133330640 in words is "one hundred thirty-three million, three hundred thirty thousand, six hundred forty".