28370641 has 8 divisors (see below), whose sum is σ = 30595880. Its totient is φ = 26151552.

The previous prime is 28370621. The next prime is 28370651. The reversal of 28370641 is 14607382.

It can be written as a sum of positive squares in 4 ways, for example, as 57600 + 28313041 = 240^2 + 5321^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28370641 - 2⁹ = 28370129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28370621) by changing a digit.

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, 13711 + ... + 15643.

It is an arithmetic number, because the mean of its divisors is an integer number (3824485).

Almost surely, 2^28370641 is an apocalyptic number.

It is an amenable number.

28370641 is a deficient number, since it is larger than the sum of its proper divisors (2225239).

28370641 is a wasteful number, since it uses less digits than its factorization.

28370641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3075.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 28370641 is about 5326.4097664374. The cubic root of 28370641 is about 304.9928906343.

The spelling of 28370641 in words is "twenty-eight million, three hundred seventy thousand, six hundred forty-one".