990053898 has 8 divisors (see below), whose sum is σ = 1980107808. Its totient is φ = 330017964.

The previous prime is 990053849. The next prime is 990053899. The reversal of 990053898 is 898350099.

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

990053898 is an admirable number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 990053898.

It is not an unprimeable number, because it can be changed into a prime (990053899) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 82504486 + ... + 82504497.

It is an arithmetic number, because the mean of its divisors is an integer number (247513476).

Almost surely, 2^990053898 is an apocalyptic number.

990053898 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

990053898 is a wasteful number, since it uses less digits than its factorization.

990053898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165008988.

The product of its (nonzero) digits is 699840, while the sum is 51.

The square root of 990053898 is about 31465.1219288914. The cubic root of 990053898 is about 996.6735798648.

The spelling of 990053898 in words is "nine hundred ninety million, fifty-three thousand, eight hundred ninety-eight".