7896780864 has 336 divisors, whose sum is σ = 26643600256. Its totient is φ = 2189721600.

The previous prime is 7896780799. The next prime is 7896780883. The reversal of 7896780864 is 4680876987.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23857179 + ... + 23857509.

Almost surely, 2^7896780864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7896780864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13321800128).

7896780864 is an abundant number, since it is smaller than the sum of its proper divisors (18746819392).

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

7896780864 is a wasteful number, since it uses less digits than its factorization.

7896780864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514 (or 501 counting only the distinct ones).

The product of its (nonzero) digits is 32514048, while the sum is 63.

The square root of 7896780864 is about 88863.8332731601. The cubic root of 7896780864 is about 1991.3611441444.

The spelling of 7896780864 in words is "seven billion, eight hundred ninety-six million, seven hundred eighty thousand, eight hundred sixty-four".