7890019812 has 60 divisors (see below), whose sum is σ = 20857900140. Its totient is φ = 2600446464.

The previous prime is 7890019729. The next prime is 7890019873. The reversal of 7890019812 is 2189100987.

It can be written as a sum of positive squares in 2 ways, for example, as 1352327076 + 6537692736 = 36774^2 + 80856^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 107973 + ... + 165644.

It is an arithmetic number, because the mean of its divisors is an integer number (347631669).

Almost surely, 2^7890019812 is an apocalyptic number.

It is an amenable number.

7890019812 is an abundant number, since it is smaller than the sum of its proper divisors (12967880328).

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

7890019812 is a wasteful number, since it uses less digits than its factorization.

7890019812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273722 (or 273711 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 45.

The square root of 7890019812 is about 88825.7834865530. The cubic root of 7890019812 is about 1990.7926618414.

The spelling of 7890019812 in words is "seven billion, eight hundred ninety million, nineteen thousand, eight hundred twelve".