8638380 has 96 divisors (see below), whose sum is σ = 28486080. Its totient is φ = 2165760.

The previous prime is 8638379. The next prime is 8638381. The reversal of 8638380 is 838368.

It is an interprime number because it is at equal distance from previous prime (8638379) and next prime (8638381).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8638381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8710 + ... + 9650.

It is an arithmetic number, because the mean of its divisors is an integer number (296730).

Almost surely, 2^8638380 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8638380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14243040).

8638380 is an abundant number, since it is smaller than the sum of its proper divisors (19847700).

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

8638380 is a wasteful number, since it uses less digits than its factorization.

8638380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976 (or 968 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 8638380 is about 2939.1121108253. The cubic root of 8638380 is about 205.1842879800.

The spelling of 8638380 in words is "eight million, six hundred thirty-eight thousand, three hundred eighty".