999770012 has 24 divisors (see below), whose sum is σ = 1814218560. Its totient is φ = 481503680.

The previous prime is 999770011. The next prime is 999770021. The reversal of 999770012 is 210077999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999770011) 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, 39998 + ... + 59994.

It is an arithmetic number, because the mean of its divisors is an integer number (75592440).

Almost surely, 2^999770012 is an apocalyptic number.

It is an amenable number.

999770012 is a deficient number, since it is larger than the sum of its proper divisors (814448548).

999770012 is a wasteful number, since it uses less digits than its factorization.

999770012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20461 (or 20459 counting only the distinct ones).

The product of its (nonzero) digits is 71442, while the sum is 44.

The square root of 999770012 is about 31619.1399630034. The cubic root of 999770012 is about 999.9233314554.

The spelling of 999770012 in words is "nine hundred ninety-nine million, seven hundred seventy thousand, twelve".