1798722378 has 48 divisors (see below), whose sum is σ = 3958808256. Its totient is φ = 590130240.

The previous prime is 1798722377. The next prime is 1798722473. The reversal of 1798722378 is 8732278971.

1798722378 is a `hidden beast` number, since 179 + 87 + 22 + 378 = 666.

It is not an unprimeable number, because it can be changed into a prime (1798722377) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1401325 + ... + 1402607.

It is an arithmetic number, because the mean of its divisors is an integer number (82475172).

Almost surely, 2^1798722378 is an apocalyptic number.

1798722378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1798722378 is an abundant number, since it is smaller than the sum of its proper divisors (2160085878).

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

1798722378 is a wasteful number, since it uses less digits than its factorization.

1798722378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2459 (or 2456 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 54.

The square root of 1798722378 is about 42411.3472787649. The cubic root of 1798722378 is about 1216.1525252503.

The spelling of 1798722378 in words is "one billion, seven hundred ninety-eight million, seven hundred twenty-two thousand, three hundred seventy-eight".