133349720 has 32 divisors (see below), whose sum is σ = 342900000. Its totient is φ = 45719808.

The previous prime is 133349719. The next prime is 133349729. The reversal of 133349720 is 27943331.

It is a super-3 number, since 3×133349720³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133349729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237845 + ... + 238404.

It is an arithmetic number, because the mean of its divisors is an integer number (10715625).

Almost surely, 2^133349720 is an apocalyptic number.

133349720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133349720 is an abundant number, since it is smaller than the sum of its proper divisors (209550280).

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

133349720 is a wasteful number, since it uses less digits than its factorization.

133349720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476267 (or 476263 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 133349720 is about 11547.7149254734. The cubic root of 133349720 is about 510.8938828338.

The spelling of 133349720 in words is "one hundred thirty-three million, three hundred forty-nine thousand, seven hundred twenty".