133280930 has 16 divisors (see below), whose sum is σ = 241295544. Its totient is φ = 53003520.

The previous prime is 133280923. The next prime is 133280957. The reversal of 133280930 is 39082331.

It can be written as a sum of positive squares in 4 ways, for example, as 132963961 + 316969 = 11531^2 + 563^2 .

It is a junction number, because it is equal to n+sod(n) for n = 133280893 and 133280902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36791 + ... + 40250.

Almost surely, 2^133280930 is an apocalyptic number.

133280930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133280930 is a deficient number, since it is larger than the sum of its proper divisors (108014614).

133280930 is a wasteful number, since it uses less digits than its factorization.

133280930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77221.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 133280930 is about 11544.7360298969. The cubic root of 133280930 is about 510.8060175445.

It can be divided in two parts, 133 and 280930, that multiplied together give a triangular number (37363690 = T₈₆₄₄).

The spelling of 133280930 in words is "one hundred thirty-three million, two hundred eighty thousand, nine hundred thirty".