28747641 has 8 divisors (see below), whose sum is σ = 41278720. Its totient is φ = 17690832.

The previous prime is 28747577. The next prime is 28747651. The reversal of 28747641 is 14674782.

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

It is not a de Polignac number, because 28747641 - 2⁶ = 28747577 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 737119 = 28747641 / (2 + 8 + 7 + 4 + 7 + 6 + 4 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28747641.

It is not an unprimeable number, because it can be changed into a prime (28747651) 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, 368521 + ... + 368598.

It is an arithmetic number, because the mean of its divisors is an integer number (5159840).

Almost surely, 2^28747641 is an apocalyptic number.

It is an amenable number.

28747641 is a deficient number, since it is larger than the sum of its proper divisors (12531079).

28747641 is a wasteful number, since it uses less digits than its factorization.

28747641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737135.

The product of its digits is 75264, while the sum is 39.

The square root of 28747641 is about 5361.6826649849. The cubic root of 28747641 is about 306.3379047394.

The spelling of 28747641 in words is "twenty-eight million, seven hundred forty-seven thousand, six hundred forty-one".