1998654000 has 320 divisors, whose sum is σ = 7688079360. Its totient is φ = 436761600.

The previous prime is 1998653999. The next prime is 1998654029. The reversal of 1998654000 is 4568991.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 964966 + ... + 967034.

It is an arithmetic number, because the mean of its divisors is an integer number (24025248).

Almost surely, 2^1998654000 is an apocalyptic number.

1998654000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1998654000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3844039680).

1998654000 is an abundant number, since it is smaller than the sum of its proper divisors (5689425360).

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

1998654000 is a wasteful number, since it uses less digits than its factorization.

1998654000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125 (or 2109 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 1998654000 is about 44706.3082797048. The cubic root of 1998654000 is about 1259.6383441762.

The spelling of 1998654000 in words is "one billion, nine hundred ninety-eight million, six hundred fifty-four thousand".