999007650 has 144 divisors (see below), whose sum is σ = 2841827040. Its totient is φ = 250905600.

The previous prime is 999007649. The next prime is 999007651. The reversal of 999007650 is 56700999.

It is an interprime number because it is at equal distance from previous prime (999007649) and next prime (999007651).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 999007596 and 999007605.

It is not an unprimeable number, because it can be changed into a prime (999007651) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2829874 + ... + 2830226.

It is an arithmetic number, because the mean of its divisors is an integer number (19734910).

Almost surely, 2^999007650 is an apocalyptic number.

999007650 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 999007650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1420913520).

999007650 is an abundant number, since it is smaller than the sum of its proper divisors (1842819390).

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

999007650 is a wasteful number, since it uses less digits than its factorization.

999007650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721 (or 713 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 45.

The square root of 999007650 is about 31607.0822759710. The cubic root of 999007650 is about 999.6691071887.

The spelling of 999007650 in words is "nine hundred ninety-nine million, seven thousand, six hundred fifty".