8261428 has 48 divisors (see below), whose sum is σ = 17781120. Its totient is φ = 3279744.

The previous prime is 8261419. The next prime is 8261441. The reversal of 8261428 is 8241628.

It is a self number, because there is not a number n which added to its sum of digits gives 8261428.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28050 + ... + 28342.

It is an arithmetic number, because the mean of its divisors is an integer number (370440).

Almost surely, 2^8261428 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 8261428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8890560).

8261428 is an abundant number, since it is smaller than the sum of its proper divisors (9519692).

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

8261428 is a wasteful number, since it uses less digits than its factorization.

8261428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 374 counting only the distinct ones).

The product of its digits is 6144, while the sum is 31.

The square root of 8261428 is about 2874.2699942768. The cubic root of 8261428 is about 202.1552575620.

The spelling of 8261428 in words is "eight million, two hundred sixty-one thousand, four hundred twenty-eight".