990858238 has 8 divisors (see below), whose sum is σ = 1487680920. Its totient is φ = 494964600.

The previous prime is 990858229. The next prime is 990858251. The reversal of 990858238 is 832858099.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229588 + ... + 233863.

It is an arithmetic number, because the mean of its divisors is an integer number (185960115).

Almost surely, 2^990858238 is an apocalyptic number.

990858238 is a deficient number, since it is larger than the sum of its proper divisors (496822682).

990858238 is a wasteful number, since it uses less digits than its factorization.

990858238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464522.

The product of its (nonzero) digits is 1244160, while the sum is 52.

The square root of 990858238 is about 31477.9007876955. The cubic root of 990858238 is about 996.9434127936.

The spelling of 990858238 in words is "nine hundred ninety million, eight hundred fifty-eight thousand, two hundred thirty-eight".