28077201 has 12 divisors (see below), whose sum is σ = 40929460. Its totient is φ = 18545760.

The previous prime is 28077197. The next prime is 28077229. The reversal of 28077201 is 10277082.

It can be written as a sum of positive squares in 2 ways, for example, as 7420176 + 20657025 = 2724^2 + 4545^2 .

It is not a de Polignac number, because 28077201 - 2² = 28077197 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 (28077241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13330 + ... + 15291.

Almost surely, 2^28077201 is an apocalyptic number.

It is an amenable number.

28077201 is a deficient number, since it is larger than the sum of its proper divisors (12852259).

28077201 is a wasteful number, since it uses less digits than its factorization.

28077201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28736 (or 28733 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 28077201 is about 5298.7924095967. The cubic root of 28077201 is about 303.9377216895.

The spelling of 28077201 in words is "twenty-eight million, seventy-seven thousand, two hundred one".