28210649 has 8 divisors (see below), whose sum is σ = 30720000. Its totient is φ = 25803792.

The previous prime is 28210619. The next prime is 28210661. The reversal of 28210649 is 94601282.

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 28210649 - 2⁸ = 28210393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28210619) 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, 25049 + ... + 26150.

It is an arithmetic number, because the mean of its divisors is an integer number (3840000).

Almost surely, 2^28210649 is an apocalyptic number.

28210649 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

28210649 is a deficient number, since it is larger than the sum of its proper divisors (2509351).

28210649 is a wasteful number, since it uses less digits than its factorization.

28210649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51247.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 28210649 is about 5311.3697856579. The cubic root of 28210649 is about 304.4184888817.

The spelling of 28210649 in words is "twenty-eight million, two hundred ten thousand, six hundred forty-nine".