133740720 has 100 divisors (see below), whose sum is σ = 464523840. Its totient is φ = 35662464.

The previous prime is 133740703. The next prime is 133740767. The reversal of 133740720 is 27047331.

It is a super-2 number, since 2×133740720² = 35773160372236800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3840 + ... + 16799.

Almost surely, 2^133740720 is an apocalyptic number.

133740720 is a gapful number since it is divisible by the number (10) 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 133740720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232261920).

133740720 is an abundant number, since it is smaller than the sum of its proper divisors (330783120).

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

133740720 is a wasteful number, since it uses less digits than its factorization.

133740720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20664 (or 20649 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 133740720 is about 11564.6322898742. The cubic root of 133740720 is about 511.3927329868.

The spelling of 133740720 in words is "one hundred thirty-three million, seven hundred forty thousand, seven hundred twenty".