990211442 has 16 divisors (see below), whose sum is σ = 1621037664. Its totient is φ = 449904000.

The previous prime is 990211421. The next prime is 990211451. The reversal of 990211442 is 244112099.

It is a junction number, because it is equal to n+sod(n) for n = 990211399 and 990211408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51842 + ... + 68322.

It is an arithmetic number, because the mean of its divisors is an integer number (101314854).

Almost surely, 2^990211442 is an apocalyptic number.

990211442 is a deficient number, since it is larger than the sum of its proper divisors (630826222).

990211442 is a wasteful number, since it uses less digits than its factorization.

990211442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19225.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 990211442 is about 31467.6252996631. The cubic root of 990211442 is about 996.7264428503.

The spelling of 990211442 in words is "nine hundred ninety million, two hundred eleven thousand, four hundred forty-two".