133739208 has 64 divisors (see below), whose sum is σ = 383500800. Its totient is φ = 43139520.

The previous prime is 133739183. The next prime is 133739209. The reversal of 133739208 is 802937331.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (133739209) 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, 3291 + ... + 16682.

It is an arithmetic number, because the mean of its divisors is an integer number (5992200).

Almost surely, 2^133739208 is an apocalyptic number.

133739208 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

133739208 is an abundant number, since it is smaller than the sum of its proper divisors (249761592).

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

133739208 is a wasteful number, since it uses less digits than its factorization.

133739208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20019 (or 20009 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 133739208 is about 11564.5669179611. The cubic root of 133739208 is about 511.3908058033.

The spelling of 133739208 in words is "one hundred thirty-three million, seven hundred thirty-nine thousand, two hundred eight".