8649426240 has 1120 divisors, whose sum is σ = 40067301120. Its totient is φ = 1719926784.

The previous prime is 8649426239. The next prime is 8649426241. The reversal of 8649426240 is 426249468.

It is an interprime number because it is at equal distance from previous prime (8649426239) and next prime (8649426241).

It is a tau number, because it is divible by the number of its divisors (1120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8649426241) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 44815584 + ... + 44815776.

It is an arithmetic number, because the mean of its divisors is an integer number (35774376).

Almost surely, 2^8649426240 is an apocalyptic number.

8649426240 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 8649426240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20033650560).

8649426240 is an abundant number, since it is smaller than the sum of its proper divisors (31417874880).

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

8649426240 is a wasteful number, since it uses less digits than its factorization.

8649426240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 242 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The square root of 8649426240 is about 93002.2915846701. The cubic root of 8649426240 is about 2052.7170982993.

The spelling of 8649426240 in words is "eight billion, six hundred forty-nine million, four hundred twenty-six thousand, two hundred forty".