8258021244 has 72 divisors (see below), whose sum is σ = 22846631808. Its totient is φ = 2494242720.

The previous prime is 8258021209. The next prime is 8258021309. The reversal of 8258021244 is 4421208528.

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

It is a junction number, because it is equal to n+sod(n) for n = 8258021199 and 8258021208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87609 + ... + 155535.

Almost surely, 2^8258021244 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 8258021244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11423315904).

8258021244 is an abundant number, since it is smaller than the sum of its proper divisors (14588610564).

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

8258021244 is a wasteful number, since it uses less digits than its factorization.

8258021244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68255 (or 68250 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 36.

The square root of 8258021244 is about 90873.6553903275. The cubic root of 8258021244 is about 2021.2746622765.

The spelling of 8258021244 in words is "eight billion, two hundred fifty-eight million, twenty-one thousand, two hundred forty-four".