8211977436 has 24 divisors (see below), whose sum is σ = 20635225744. Its totient is φ = 2526762240.

The previous prime is 8211977429. The next prime is 8211977467. The reversal of 8211977436 is 6347791128.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26320285 + ... + 26320596.

Almost surely, 2^8211977436 is an apocalyptic number.

It is an amenable number.

8211977436 is an abundant number, since it is smaller than the sum of its proper divisors (12423248308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8211977436 is a wasteful number, since it uses less digits than its factorization.

8211977436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52640901 (or 52640899 counting only the distinct ones).

The product of its digits is 508032, while the sum is 48.

The square root of 8211977436 is about 90619.9615758029. The cubic root of 8211977436 is about 2017.5110209471.

The spelling of 8211977436 in words is "eight billion, two hundred eleven million, nine hundred seventy-seven thousand, four hundred thirty-six".