8391254220 has 288 divisors, whose sum is σ = 27662229504. Its totient is φ = 2052864000.

The previous prime is 8391254219. The next prime is 8391254227. The reversal of 8391254220 is 224521938.

It is a happy number.

8391254220 is a `hidden beast` number, since 8 + 3 + 91 + 2 + 542 + 20 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (8391254227) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 19379124 + ... + 19379556.

It is an arithmetic number, because the mean of its divisors is an integer number (96049408).

Almost surely, 2^8391254220 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 8391254220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13831114752).

8391254220 is an abundant number, since it is smaller than the sum of its proper divisors (19270975284).

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

8391254220 is a wasteful number, since it uses less digits than its factorization.

8391254220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 8391254220 is about 91603.7893321013. The cubic root of 8391254220 is about 2032.0869782530.

The spelling of 8391254220 in words is "eight billion, three hundred ninety-one million, two hundred fifty-four thousand, two hundred twenty".