28740441 has 8 divisors (see below), whose sum is σ = 39556864. Its totient is φ = 18542160.

The previous prime is 28740433. The next prime is 28740451. The reversal of 28740441 is 14404782.

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

It is not a de Polignac number, because 28740441 - 2³ = 28740433 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28740399 and 28740408.

It is not an unprimeable number, because it can be changed into a prime (28740401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154426 + ... + 154611.

It is an arithmetic number, because the mean of its divisors is an integer number (4944608).

Almost surely, 2^28740441 is an apocalyptic number.

It is an amenable number.

28740441 is a deficient number, since it is larger than the sum of its proper divisors (10816423).

28740441 is a wasteful number, since it uses less digits than its factorization.

28740441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309071.

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 28740441 is about 5361.0111919301. The cubic root of 28740441 is about 306.3123279500.

The spelling of 28740441 in words is "twenty-eight million, seven hundred forty thousand, four hundred forty-one".