1898478816 has 48 divisors (see below), whose sum is σ = 5366857104. Its totient is φ = 584146944.

The previous prime is 1898478797. The next prime is 1898478863. The reversal of 1898478816 is 6188748981.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1898478816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 759361 + ... + 761856.

It is an arithmetic number, because the mean of its divisors is an integer number (111809523).

Almost surely, 2^1898478816 is an apocalyptic number.

1898478816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1898478816 is an abundant number, since it is smaller than the sum of its proper divisors (3468378288).

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

1898478816 is a wasteful number, since it uses less digits than its factorization.

1898478816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521243 (or 1521235 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 60.

The square root of 1898478816 is about 43571.5367642685. The cubic root of 1898478816 is about 1238.2317008169.

The spelling of 1898478816 in words is "one billion, eight hundred ninety-eight million, four hundred seventy-eight thousand, eight hundred sixteen".