990685958 has 8 divisors (see below), whose sum is σ = 1499662560. Its totient is φ = 490798440.

The previous prime is 990685957. The next prime is 990685963. The reversal of 990685958 is 859586099.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 990685897 and 990685906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990685957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2271998 + ... + 2272433.

It is an arithmetic number, because the mean of its divisors is an integer number (187457820).

Almost surely, 2^990685958 is an apocalyptic number.

990685958 is a deficient number, since it is larger than the sum of its proper divisors (508976602).

990685958 is a wasteful number, since it uses less digits than its factorization.

990685958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4544542.

The product of its (nonzero) digits is 6998400, while the sum is 59.

The square root of 990685958 is about 31475.1641457197. The cubic root of 990685958 is about 996.8856301025.

The spelling of 990685958 in words is "nine hundred ninety million, six hundred eighty-five thousand, nine hundred fifty-eight".