7648687988 has 6 divisors (see below), whose sum is σ = 13385203986. Its totient is φ = 3824343992.

The previous prime is 7648687967. The next prime is 7648687999. The reversal of 7648687988 is 8897868467.

It can be written as a sum of positive squares in only one way, i.e., 7553000464 + 95687524 = 86908^2 + 9782^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 956085995 + ... + 956086002.

It is an arithmetic number, because the mean of its divisors is an integer number (2230867331).

Almost surely, 2^7648687988 is an apocalyptic number.

It is an amenable number.

7648687988 is a deficient number, since it is larger than the sum of its proper divisors (5736515998).

7648687988 is a wasteful number, since it uses less digits than its factorization.

7648687988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912172001 (or 1912171999 counting only the distinct ones).

The product of its digits is 260112384, while the sum is 71.

The square root of 7648687988 is about 87456.7778276790. Note that the first 3 decimals coincide. The cubic root of 7648687988 is about 1970.2846855966.

The spelling of 7648687988 in words is "seven billion, six hundred forty-eight million, six hundred eighty-seven thousand, nine hundred eighty-eight".