8344639802 has 16 divisors (see below), whose sum is σ = 12765320712. Its totient is φ = 4089683520.

The previous prime is 8344639789. The next prime is 8344639817. The reversal of 8344639802 is 2089364438.

It is a Cunningham number, because it is equal to 91349²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 6015708721 + 2328931081 = 77561^2 + 48259^2 .

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, 75368 + ... + 149564.

Almost surely, 2^8344639802 is an apocalyptic number.

8344639802 is a deficient number, since it is larger than the sum of its proper divisors (4420680910).

8344639802 is a wasteful number, since it uses less digits than its factorization.

8344639802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75313.

The product of its (nonzero) digits is 995328, while the sum is 47.

The square root of 8344639802 is about 91349.0000054735. Note that the first 5 decimals coincide. The cubic root of 8344639802 is about 2028.3171605068.

The spelling of 8344639802 in words is "eight billion, three hundred forty-four million, six hundred thirty-nine thousand, eight hundred two".