133499730 has 128 divisors (see below), whose sum is σ = 399974400. Its totient is φ = 27765504.

The previous prime is 133499701. The next prime is 133499761. The reversal of 133499730 is 37994331.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 215361 + ... + 215979.

It is an arithmetic number, because the mean of its divisors is an integer number (3124800).

Almost surely, 2^133499730 is an apocalyptic number.

133499730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 133499730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199987200).

133499730 is an abundant number, since it is smaller than the sum of its proper divisors (266474670).

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

133499730 is a wasteful number, since it uses less digits than its factorization.

133499730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728.

The product of its (nonzero) digits is 61236, while the sum is 39.

The square root of 133499730 is about 11554.2083242427. The cubic root of 133499730 is about 511.0853854762.

The spelling of 133499730 in words is "one hundred thirty-three million, four hundred ninety-nine thousand, seven hundred thirty".