999770112 has 144 divisors (see below), whose sum is σ = 3150660240. Its totient is φ = 302899200.

The previous prime is 999770087. The next prime is 999770131. The reversal of 999770112 is 211077999.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-4 number, since 4×999770112⁴ (a number of 37 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 200287 + ... + 205217.

It is an arithmetic number, because the mean of its divisors is an integer number (21879585).

Almost surely, 2^999770112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999770112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1575330120).

999770112 is an abundant number, since it is smaller than the sum of its proper divisors (2150890128).

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

999770112 is a wasteful number, since it uses less digits than its factorization.

999770112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4970 (or 4947 counting only the distinct ones).

The product of its (nonzero) digits is 71442, while the sum is 45.

The square root of 999770112 is about 31619.1415443241. The cubic root of 999770112 is about 999.9233647939.

The spelling of 999770112 in words is "nine hundred ninety-nine million, seven hundred seventy thousand, one hundred twelve".