28627261 has 8 divisors (see below), whose sum is σ = 31411800. Its totient is φ = 25925952.

The previous prime is 28627259. The next prime is 28627283. The reversal of 28627261 is 16272682.

It can be written as a sum of positive squares in 4 ways, for example, as 4761 + 28622500 = 69^2 + 5350^2 .

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

It is not a de Polignac number, because 28627261 - 2¹ = 28627259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28627211) 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, 20086 + ... + 21463.

It is an arithmetic number, because the mean of its divisors is an integer number (3926475).

Almost surely, 2^28627261 is an apocalyptic number.

It is an amenable number.

28627261 is a deficient number, since it is larger than the sum of its proper divisors (2784539).

28627261 is a wasteful number, since it uses less digits than its factorization.

28627261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41615.

The product of its digits is 16128, while the sum is 34.

The square root of 28627261 is about 5350.4449347694. Note that the first 3 decimals coincide. The cubic root of 28627261 is about 305.9097124943.

The spelling of 28627261 in words is "twenty-eight million, six hundred twenty-seven thousand, two hundred sixty-one".