1998458454 has 64 divisors (see below), whose sum is σ = 4338436608. Its totient is φ = 612057600.

The previous prime is 1998458453. The next prime is 1998458491. The reversal of 1998458454 is 4548548991.

It is a junction number, because it is equal to n+sod(n) for n = 1998458394 and 1998458403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998458453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 359214 + ... + 364734.

It is an arithmetic number, because the mean of its divisors is an integer number (67788072).

Almost surely, 2^1998458454 is an apocalyptic number.

1998458454 is an abundant number, since it is smaller than the sum of its proper divisors (2339978154).

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

1998458454 is a wasteful number, since it uses less digits than its factorization.

1998458454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5653.

The product of its digits is 8294400, while the sum is 57.

The square root of 1998458454 is about 44704.1212194133. The cubic root of 1998458454 is about 1259.5972623159.

The spelling of 1998458454 in words is "one billion, nine hundred ninety-eight million, four hundred fifty-eight thousand, four hundred fifty-four".