133780438 has 16 divisors (see below), whose sum is σ = 225976320. Its totient is φ = 58847400.

The previous prime is 133780433. The next prime is 133780477. The reversal of 133780438 is 834087331.

It is a junction number, because it is equal to n+sod(n) for n = 133780397 and 133780406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133780433) 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, 97398 + ... + 98761.

It is an arithmetic number, because the mean of its divisors is an integer number (14123520).

Almost surely, 2^133780438 is an apocalyptic number.

133780438 is a deficient number, since it is larger than the sum of its proper divisors (92195882).

133780438 is a wasteful number, since it uses less digits than its factorization.

133780438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196203.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 133780438 is about 11566.3493808548. The cubic root of 133780438 is about 511.4433520409.

The spelling of 133780438 in words is "one hundred thirty-three million, seven hundred eighty thousand, four hundred thirty-eight".