999722610 has 96 divisors (see below), whose sum is σ = 2680546752. Its totient is φ = 258318720.

The previous prime is 999722599. The next prime is 999722617. The reversal of 999722610 is 16227999.

999722610 is a `hidden beast` number, since 9 + 9 + 9 + 7 + 22 + 610 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (999722617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1101777 + ... + 1102683.

It is an arithmetic number, because the mean of its divisors is an integer number (27922362).

Almost surely, 2^999722610 is an apocalyptic number.

999722610 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 999722610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1340273376).

999722610 is an abundant number, since it is smaller than the sum of its proper divisors (1680824142).

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

999722610 is a wasteful number, since it uses less digits than its factorization.

999722610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288 (or 1285 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 999722610 is about 31618.3903764882. The cubic root of 999722610 is about 999.9075281159.

The spelling of 999722610 in words is "nine hundred ninety-nine million, seven hundred twenty-two thousand, six hundred ten".