990139222 has 8 divisors (see below), whose sum is σ = 1498352616. Its totient is φ = 490688352.

The previous prime is 990139207. The next prime is 990139247. The reversal of 990139222 is 222931099.

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, 2190348 + ... + 2190799.

It is an arithmetic number, because the mean of its divisors is an integer number (187294077).

Almost surely, 2^990139222 is an apocalyptic number.

990139222 is a deficient number, since it is larger than the sum of its proper divisors (508213394).

990139222 is a wasteful number, since it uses less digits than its factorization.

990139222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4381262.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 990139222 is about 31466.4777501391. The cubic root of 990139222 is about 996.7022105396.

The spelling of 990139222 in words is "nine hundred ninety million, one hundred thirty-nine thousand, two hundred twenty-two".