8436985408 has 14 divisors (see below), whose sum is σ = 16742143046. Its totient is φ = 4218492672.

The previous prime is 8436985363. The next prime is 8436985411. The reversal of 8436985408 is 8045896348.

It can be written as a sum of positive squares in only one way, i.e., 4283440704 + 4153544704 = 65448^2 + 64448^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65913885 + ... + 65914012.

Almost surely, 2^8436985408 is an apocalyptic number.

It is an amenable number.

8436985408 is a deficient number, since it is larger than the sum of its proper divisors (8305157638).

8436985408 is a wasteful number, since it uses less digits than its factorization.

8436985408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131827909 (or 131827899 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 55.

The square root of 8436985408 is about 91853.0642276021. The cubic root of 8436985408 is about 2035.7718244169.

The spelling of 8436985408 in words is "eight billion, four hundred thirty-six million, nine hundred eighty-five thousand, four hundred eight".