1898218350 has 216 divisors, whose sum is σ = 6126090048. Its totient is φ = 419731200.

The previous prime is 1898218349. The next prime is 1898218367. The reversal of 1898218350 is 538128981.

It is a happy number.

1898218350 is a `hidden beast` number, since 1 + 89 + 8 + 218 + 350 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 1898218296 and 1898218305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 682162 + ... + 684938.

It is an arithmetic number, because the mean of its divisors is an integer number (28361528).

Almost surely, 2^1898218350 is an apocalyptic number.

1898218350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1898218350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3063045024).

1898218350 is an abundant number, since it is smaller than the sum of its proper divisors (4227871698).

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

1898218350 is a wasteful number, since it uses less digits than its factorization.

1898218350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2840 (or 2825 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 1898218350 is about 43568.5477150662. The cubic root of 1898218350 is about 1238.1750709147.

The spelling of 1898218350 in words is "one billion, eight hundred ninety-eight million, two hundred eighteen thousand, three hundred fifty".