1798542198 has 16 divisors (see below), whose sum is σ = 3996760560. Its totient is φ = 599514048.

The previous prime is 1798542167. The next prime is 1798542211. The reversal of 1798542198 is 8912458971.

It is a happy number.

1798542198 is a `hidden beast` number, since 1 + 7 + 9 + 8 + 542 + 1 + 98 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 33306337 = 1798542198 / (1 + 7 + 9 + 8 + 5 + 4 + 2 + 1 + 9 + 8).

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, 16653115 + ... + 16653222.

It is an arithmetic number, because the mean of its divisors is an integer number (249797535).

Almost surely, 2^1798542198 is an apocalyptic number.

1798542198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1798542198 is an abundant number, since it is smaller than the sum of its proper divisors (2198218362).

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

1798542198 is a wasteful number, since it uses less digits than its factorization.

1798542198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33306348 (or 33306342 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 54.

The square root of 1798542198 is about 42409.2230299024. The cubic root of 1798542198 is about 1216.1119161154. Note that the first 3 decimals are identical.

The spelling of 1798542198 in words is "one billion, seven hundred ninety-eight million, five hundred forty-two thousand, one hundred ninety-eight".