1898994000 has 80 divisors (see below), whose sum is σ = 6122376000. Its totient is φ = 506396800.

The previous prime is 1898993951. The next prime is 1898994059. The reversal of 1898994000 is 4998981.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152250 + ... + 164249.

It is an arithmetic number, because the mean of its divisors is an integer number (76529700).

Almost surely, 2^1898994000 is an apocalyptic number.

1898994000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1898994000 is an abundant number, since it is smaller than the sum of its proper divisors (4223382000).

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

1898994000 is a wasteful number, since it uses less digits than its factorization.

1898994000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316525 (or 316509 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 48.

The square root of 1898994000 is about 43577.4482961084. The cubic root of 1898994000 is about 1238.3436956521.

The spelling of 1898994000 in words is "one billion, eight hundred ninety-eight million, nine hundred ninety-four thousand".