28861326 has 32 divisors (see below), whose sum is σ = 69071520. Its totient is φ = 8880192.

The previous prime is 28861319. The next prime is 28861331. The reversal of 28861326 is 62316882.

It is a super-2 number, since 2×28861326² = 1665952276956552, which contains 22 as substring.

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, 19855 + ... + 21258.

It is an arithmetic number, because the mean of its divisors is an integer number (2158485).

Almost surely, 2^28861326 is an apocalyptic number.

28861326 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28861326 is an abundant number, since it is smaller than the sum of its proper divisors (40210194).

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

28861326 is a wasteful number, since it uses less digits than its factorization.

28861326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41137 (or 41131 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 28861326 is about 5372.2738202739. The cubic root of 28861326 is about 306.7411867316.

The spelling of 28861326 in words is "twenty-eight million, eight hundred sixty-one thousand, three hundred twenty-six".