8782621906 has 16 divisors (see below), whose sum is σ = 13953000600. Its totient is φ = 4131774720.

The previous prime is 8782621877. The next prime is 8782621907. The reversal of 8782621906 is 6091262878.

It can be written as a sum of positive squares in 4 ways, for example, as 8725241281 + 57380625 = 93409^2 + 7575^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8782621906.

It is not an unprimeable number, because it can be changed into a prime (8782621907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83920 + ... + 156868.

Almost surely, 2^8782621906 is an apocalyptic number.

8782621906 is a deficient number, since it is larger than the sum of its proper divisors (5170378694).

8782621906 is a wasteful number, since it uses less digits than its factorization.

8782621906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76509.

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 8782621906 is about 93715.6438701672. The cubic root of 8782621906 is about 2063.2003155764.

The spelling of 8782621906 in words is "eight billion, seven hundred eighty-two million, six hundred twenty-one thousand, nine hundred six".