7896921958 has 16 divisors (see below), whose sum is σ = 12233600640. Its totient is φ = 3819182400.

The previous prime is 7896921947. The next prime is 7896921961. The reversal of 7896921958 is 8591296987.

It is a super-2 number, since 2×7896921958² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7896921958.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97498 + ... + 159058.

It is an arithmetic number, because the mean of its divisors is an integer number (764600040).

Almost surely, 2^7896921958 is an apocalyptic number.

7896921958 is a deficient number, since it is larger than the sum of its proper divisors (4336678682).

7896921958 is a wasteful number, since it uses less digits than its factorization.

7896921958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63663.

The product of its digits is 19595520, while the sum is 64.

The square root of 7896921958 is about 88864.6271471388. The cubic root of 7896921958 is about 1991.3730041433.

The spelling of 7896921958 in words is "seven billion, eight hundred ninety-six million, nine hundred twenty-one thousand, nine hundred fifty-eight".