7897219092 has 84 divisors (see below), whose sum is σ = 23680885536. Its totient is φ = 2256342480.

The previous prime is 7897219091. The next prime is 7897219139. The reversal of 7897219092 is 2909127987.

It is a tau number, because it is divible by the number of its divisors (84).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7897219091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 173034 + ... + 213857.

It is an arithmetic number, because the mean of its divisors is an integer number (281915304).

Almost surely, 2^7897219092 is an apocalyptic number.

It is an amenable number.

7897219092 is an abundant number, since it is smaller than the sum of its proper divisors (15783666444).

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

7897219092 is a wasteful number, since it uses less digits than its factorization.

7897219092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386920 (or 386903 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 54.

The square root of 7897219092 is about 88866.2989664811. The cubic root of 7897219092 is about 1991.3979800013.

The spelling of 7897219092 in words is "seven billion, eight hundred ninety-seven million, two hundred nineteen thousand, ninety-two".