28126701 has 6 divisors (see below), whose sum is σ = 40627470. Its totient is φ = 18751128.

The previous prime is 28126699. The next prime is 28126757. The reversal of 28126701 is 10762182.

It can be written as a sum of positive squares in only one way, i.e., 24265476 + 3861225 = 4926^2 + 1965^2 .

It is not a de Polignac number, because 28126701 - 2¹ = 28126699 is a prime.

It is a super-2 number, since 2×28126701² = 1582222618286802, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28116701) 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, 1562586 + ... + 1562603.

It is an arithmetic number, because the mean of its divisors is an integer number (6771245).

Almost surely, 2^28126701 is an apocalyptic number.

It is an amenable number.

28126701 is a deficient number, since it is larger than the sum of its proper divisors (12500769).

28126701 is a wasteful number, since it uses less digits than its factorization.

28126701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3125195 (or 3125192 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 28126701 is about 5303.4612282923. The cubic root of 28126701 is about 304.1162305147.

Adding to 28126701 its reverse (10762182), we get a palindrome (38888883).

The spelling of 28126701 in words is "twenty-eight million, one hundred twenty-six thousand, seven hundred one".