8436649920 has 112 divisors (see below), whose sum is σ = 26805575040. Its totient is φ = 2248160256.

The previous prime is 8436649913. The next prime is 8436649937. The reversal of 8436649920 is 299466348.

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 15 ways as a sum of consecutive naturals, for example, 1997571 + ... + 2001789.

Almost surely, 2^8436649920 is an apocalyptic number.

8436649920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8436649920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13402787520).

8436649920 is an abundant number, since it is smaller than the sum of its proper divisors (18368925120).

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

8436649920 is a wasteful number, since it uses less digits than its factorization.

8436649920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6322 (or 6312 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 51.

The square root of 8436649920 is about 91851.2379883908. The cubic root of 8436649920 is about 2035.7448406055.

The spelling of 8436649920 in words is "eight billion, four hundred thirty-six million, six hundred forty-nine thousand, nine hundred twenty".