28841390 has 16 divisors (see below), whose sum is σ = 53122608. Its totient is φ = 11268096.

The previous prime is 28841387. The next prime is 28841437. The reversal of 28841390 is 9314882.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28841390.

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 7 ways as a sum of consecutive naturals, for example, 33107 + ... + 33966.

It is an arithmetic number, because the mean of its divisors is an integer number (3320163).

Almost surely, 2^28841390 is an apocalyptic number.

28841390 is a deficient number, since it is larger than the sum of its proper divisors (24281218).

28841390 is a wasteful number, since it uses less digits than its factorization.

28841390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67123.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 28841390 is about 5370.4180470425. The cubic root of 28841390 is about 306.6705431667.

The spelling of 28841390 in words is "twenty-eight million, eight hundred forty-one thousand, three hundred ninety".