1998094879 has 8 divisors (see below), whose sum is σ = 2226117888. Its totient is φ = 1777801560.

The previous prime is 1998094877. The next prime is 1998094907. The reversal of 1998094879 is 9784908991.

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

It is a cyclic number.

It is not a de Polignac number, because 1998094879 - 2¹ = 1998094877 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1998094879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998094871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1931877 + ... + 1932910.

It is an arithmetic number, because the mean of its divisors is an integer number (278264736).

Almost surely, 2^1998094879 is an apocalyptic number.

1998094879 is a deficient number, since it is larger than the sum of its proper divisors (228023009).

1998094879 is a wasteful number, since it uses less digits than its factorization.

1998094879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3864845.

The product of its (nonzero) digits is 11757312, while the sum is 64.

The square root of 1998094879 is about 44700.0545749108. The cubic root of 1998094879 is about 1259.5208724618.

The spelling of 1998094879 in words is "one billion, nine hundred ninety-eight million, ninety-four thousand, eight hundred seventy-nine".