905978012 has 12 divisors (see below), whose sum is σ = 1591357320. Its totient is φ = 451304496.

The previous prime is 905978011. The next prime is 905978023. The reversal of 905978012 is 210879509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (905978011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419918 + ... + 422069.

It is an arithmetic number, because the mean of its divisors is an integer number (132613110).

Almost surely, 2^905978012 is an apocalyptic number.

It is an amenable number.

905978012 is a deficient number, since it is larger than the sum of its proper divisors (685379308).

905978012 is a wasteful number, since it uses less digits than its factorization.

905978012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842260 (or 842258 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 905978012 is about 30099.4686331835. The cubic root of 905978012 is about 967.6223383326.

The spelling of 905978012 in words is "nine hundred five million, nine hundred seventy-eight thousand, twelve".