990412 has 6 divisors (see below), whose sum is σ = 1733228. Its totient is φ = 495204.

The previous prime is 990397. The next prime is 990463. The reversal of 990412 is 214099.

It is an Ulam number.

It is a zygodrome in base 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123798 + ... + 123805.

2⁹⁹⁰⁴¹² is an apocalyptic number.

It is an amenable number.

990412 is a deficient number, since it is larger than the sum of its proper divisors (742816).

990412 is a wasteful number, since it uses less digits than its factorization.

990412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247607 (or 247605 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 990412 is about 995.1944533607. The cubic root of 990412 is about 99.6793730825.

The spelling of 990412 in words is "nine hundred ninety thousand, four hundred twelve".