990990430 has 8 divisors (see below), whose sum is σ = 1783782792. Its totient is φ = 396396168.

The previous prime is 990990383. The next prime is 990990431. The reversal of 990990430 is 34099099.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990990431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49549512 + ... + 49549531.

It is an arithmetic number, because the mean of its divisors is an integer number (222972849).

Almost surely, 2^990990430 is an apocalyptic number.

990990430 is a deficient number, since it is larger than the sum of its proper divisors (792792362).

990990430 is a wasteful number, since it uses less digits than its factorization.

990990430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99099050.

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 990990430 is about 31480.0004764930. Note that the first 3 decimals coincide. The cubic root of 990990430 is about 996.9877454332.

The spelling of 990990430 in words is "nine hundred ninety million, nine hundred ninety thousand, four hundred thirty".