28077849 has 6 divisors (see below), whose sum is σ = 40556906. Its totient is φ = 18718560.

The previous prime is 28077823. The next prime is 28077851. The reversal of 28077849 is 94877082.

It can be written as a sum of positive squares in only one way, i.e., 21483225 + 6594624 = 4635^2 + 2568^2 .

It is not a de Polignac number, because 28077849 - 2⁵ = 28077817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28077869) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1559872 + ... + 1559889.

Almost surely, 2^28077849 is an apocalyptic number.

It is an amenable number.

28077849 is a deficient number, since it is larger than the sum of its proper divisors (12479057).

28077849 is a wasteful number, since it uses less digits than its factorization.

28077849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3119767 (or 3119764 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 28077849 is about 5298.8535552514. The cubic root of 28077849 is about 303.9400598871.

The spelling of 28077849 in words is "twenty-eight million, seventy-seven thousand, eight hundred forty-nine".