28252011 has 8 divisors (see below), whose sum is σ = 39885264. Its totient is φ = 17726720.

The previous prime is 28252009. The next prime is 28252013. The reversal of 28252011 is 11025282.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28252009) and next prime (28252013).

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 28252011 - 2¹ = 28252009 is a prime.

It is a super-2 number, since 2×28252011² = 1596352251088242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28252013) 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, 276930 + ... + 277031.

It is an arithmetic number, because the mean of its divisors is an integer number (4985658).

Almost surely, 2^28252011 is an apocalyptic number.

28252011 is a deficient number, since it is larger than the sum of its proper divisors (11633253).

28252011 is a wasteful number, since it uses less digits than its factorization.

28252011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553981.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 28252011 is about 5315.2620819674. The cubic root of 28252011 is about 304.5671940603.

Adding to 28252011 its reverse (11025282), we get a palindrome (39277293).

The spelling of 28252011 in words is "twenty-eight million, two hundred fifty-two thousand, eleven".