1985760078 has 8 divisors (see below), whose sum is σ = 3971520168. Its totient is φ = 661920024.

The previous prime is 1985760071. The next prime is 1985760097. The reversal of 1985760078 is 8700675891.

It is a sphenic number, since it is the product of 3 distinct primes.

1985760078 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1985760078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985760071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165480001 + ... + 165480012.

It is an arithmetic number, because the mean of its divisors is an integer number (496440021).

Almost surely, 2^1985760078 is an apocalyptic number.

1985760078 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1985760078 is a wasteful number, since it uses less digits than its factorization.

1985760078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330960018.

The product of its (nonzero) digits is 846720, while the sum is 51.

The square root of 1985760078 is about 44561.8679814929. The cubic root of 1985760078 is about 1256.9237287501.

The spelling of 1985760078 in words is "one billion, nine hundred eighty-five million, seven hundred sixty thousand, seventy-eight".