8251242738 has 32 divisors (see below), whose sum is σ = 16922670336. Its totient is φ = 2680659408.

The previous prime is 8251242721. The next prime is 8251242739. The reversal of 8251242738 is 8372421528.

It is a self number, because there is not a number n which added to its sum of digits gives 8251242738.

It is not an unprimeable number, because it can be changed into a prime (8251242739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86245 + ... + 154727.

It is an arithmetic number, because the mean of its divisors is an integer number (528833448).

Almost surely, 2^8251242738 is an apocalyptic number.

8251242738 is an abundant number, since it is smaller than the sum of its proper divisors (8671427598).

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

8251242738 is a wasteful number, since it uses less digits than its factorization.

8251242738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68998.

The product of its digits is 215040, while the sum is 42.

The square root of 8251242738 is about 90836.3514128567. The cubic root of 8251242738 is about 2020.7214638543.

It can be divided in two parts, 82512 and 42738, that added together give a triangular number (125250 = T₅₀₀).

The spelling of 8251242738 in words is "eight billion, two hundred fifty-one million, two hundred forty-two thousand, seven hundred thirty-eight".