133365720 has 64 divisors (see below), whose sum is σ = 413015040. Its totient is φ = 34416000.

The previous prime is 133365709. The next prime is 133365721. The reversal of 133365720 is 27563331.

It is a super-2 number, since 2×133365720² = 35572830542236800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133365721) 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, 14206 + ... + 21645.

It is an arithmetic number, because the mean of its divisors is an integer number (6453360).

Almost surely, 2^133365720 is an apocalyptic number.

133365720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133365720 is an abundant number, since it is smaller than the sum of its proper divisors (279649320).

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

133365720 is a wasteful number, since it uses less digits than its factorization.

133365720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35896 (or 35892 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 30.

The square root of 133365720 is about 11548.4076824470. The cubic root of 133365720 is about 510.9143152607.

The spelling of 133365720 in words is "one hundred thirty-three million, three hundred sixty-five thousand, seven hundred twenty".