1998840854 has 8 divisors (see below), whose sum is σ = 3031949880. Its totient is φ = 988190896.

The previous prime is 1998840827. The next prime is 1998840859. The reversal of 1998840854 is 4580488991.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1998840854.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998840859) 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, 5614544 + ... + 5614899.

It is an arithmetic number, because the mean of its divisors is an integer number (378993735).

Almost surely, 2^1998840854 is an apocalyptic number.

1998840854 is a deficient number, since it is larger than the sum of its proper divisors (1033109026).

1998840854 is a wasteful number, since it uses less digits than its factorization.

1998840854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11229534.

The product of its (nonzero) digits is 3317760, while the sum is 56.

The square root of 1998840854 is about 44708.3980254269. The cubic root of 1998840854 is about 1259.6775974484.

The spelling of 1998840854 in words is "one billion, nine hundred ninety-eight million, eight hundred forty thousand, eight hundred fifty-four".