8791256490 has 128 divisors (see below), whose sum is σ = 22959417600. Its totient is φ = 2146959360.

The previous prime is 8791256477. The next prime is 8791256491. The reversal of 8791256490 is 946521978.

It is not an unprimeable number, because it can be changed into a prime (8791256491) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2639146 + ... + 2642474.

It is an arithmetic number, because the mean of its divisors is an integer number (179370450).

Almost surely, 2^8791256490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8791256490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11479708800).

8791256490 is an abundant number, since it is smaller than the sum of its proper divisors (14168161110).

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

8791256490 is a wasteful number, since it uses less digits than its factorization.

8791256490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3512.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The square root of 8791256490 is about 93761.7005498514. The cubic root of 8791256490 is about 2063.8762352738.

The spelling of 8791256490 in words is "eight billion, seven hundred ninety-one million, two hundred fifty-six thousand, four hundred ninety".