1998901054 has 8 divisors (see below), whose sum is σ = 2998555200. Its totient is φ = 999382656.

The previous prime is 1998901031. The next prime is 1998901057. The reversal of 1998901054 is 4501098991.

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

It is a junction number, because it is equal to n+sod(n) for n = 1998900995 and 1998901013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998901057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20062 + ... + 66334.

It is an arithmetic number, because the mean of its divisors is an integer number (374819400).

Almost surely, 2^1998901054 is an apocalyptic number.

1998901054 is a deficient number, since it is larger than the sum of its proper divisors (999654146).

1998901054 is a wasteful number, since it uses less digits than its factorization.

1998901054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67874.

The product of its (nonzero) digits is 116640, while the sum is 46.

The square root of 1998901054 is about 44709.0712719466. The cubic root of 1998901054 is about 1259.6902434161.

The spelling of 1998901054 in words is "one billion, nine hundred ninety-eight million, nine hundred one thousand, fifty-four".