28371649 has 8 divisors (see below), whose sum is σ = 28926720. Its totient is φ = 27819600.

The previous prime is 28371647. The next prime is 28371677. The reversal of 28371649 is 94617382.

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 28371649 - 2¹ = 28371647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28371647) 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, 28734 + ... + 29704.

It is an arithmetic number, because the mean of its divisors is an integer number (3615840).

Almost surely, 2^28371649 is an apocalyptic number.

It is an amenable number.

28371649 is a deficient number, since it is larger than the sum of its proper divisors (555071).

28371649 is an equidigital number, since it uses as much as digits as its factorization.

28371649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1511.

The product of its digits is 72576, while the sum is 40.

The square root of 28371649 is about 5326.5043884334. The cubic root of 28371649 is about 304.9965026921.

The spelling of 28371649 in words is "twenty-eight million, three hundred seventy-one thousand, six hundred forty-nine".