990210312 has 128 divisors (see below), whose sum is σ = 3385401600. Its totient is φ = 261149184.

The previous prime is 990210227. The next prime is 990210323. The reversal of 990210312 is 213012099.

It is a super-2 number, since 2×990210312² = 1961032923982274688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5533 + ... + 44844.

It is an arithmetic number, because the mean of its divisors is an integer number (26448450).

Almost surely, 2^990210312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 990210312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1692700800).

990210312 is an abundant number, since it is smaller than the sum of its proper divisors (2395191288).

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

990210312 is a wasteful number, since it uses less digits than its factorization.

990210312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50412 (or 50402 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 990210312 is about 31467.6073446965. The cubic root of 990210312 is about 996.7260637052.

The spelling of 990210312 in words is "nine hundred ninety million, two hundred ten thousand, three hundred twelve".