999722358 has 64 divisors (see below), whose sum is σ = 2278471680. Its totient is φ = 324795744.

The previous prime is 999722357. The next prime is 999722359. The reversal of 999722358 is 853227999.

It is an interprime number because it is at equal distance from previous prime (999722357) and next prime (999722359).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999722357) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 465435 + ... + 467577.

It is an arithmetic number, because the mean of its divisors is an integer number (35601120).

Almost surely, 2^999722358 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999722358, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1139235840).

999722358 is an abundant number, since it is smaller than the sum of its proper divisors (1278749322).

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

999722358 is a wasteful number, since it uses less digits than its factorization.

999722358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2370 (or 2364 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 999722358 is about 31618.3863914653. The cubic root of 999722358 is about 999.9074441003.

The spelling of 999722358 in words is "nine hundred ninety-nine million, seven hundred twenty-two thousand, three hundred fifty-eight".