905781138 has 8 divisors (see below), whose sum is σ = 1811562288. Its totient is φ = 301927044.

The previous prime is 905781119. The next prime is 905781161. The reversal of 905781138 is 831187509.

It is a sphenic number, since it is the product of 3 distinct primes.

905781138 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 905781138.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75481756 + ... + 75481767.

It is an arithmetic number, because the mean of its divisors is an integer number (226445286).

Almost surely, 2^905781138 is an apocalyptic number.

905781138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

905781138 is a wasteful number, since it uses less digits than its factorization.

905781138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150963528.

The product of its (nonzero) digits is 60480, while the sum is 42.

The square root of 905781138 is about 30096.1980655365. The cubic root of 905781138 is about 967.5522433714.

The spelling of 905781138 in words is "nine hundred five million, seven hundred eighty-one thousand, one hundred thirty-eight".