28011707 has 2 divisors, whose sum is σ = 28011708. Its totient is φ = 28011706.

The previous prime is 28011703. The next prime is 28011721. The reversal of 28011707 is 70711082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28011707 - 2² = 28011703 is a prime.

It is not a weakly prime, because it can be changed into another prime (28011703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14005853 + 14005854.

It is an arithmetic number, because the mean of its divisors is an integer number (14005854).

Almost surely, 2^28011707 is an apocalyptic number.

28011707 is a deficient number, since it is larger than the sum of its proper divisors (1).

28011707 is an equidigital number, since it uses as much as digits as its factorization.

28011707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 28011707 is about 5292.6087140464. The cubic root of 28011707 is about 303.7012119420.

Adding to 28011707 its reverse (70711082), we get a palindrome (98722789).

The spelling of 28011707 in words is "twenty-eight million, eleven thousand, seven hundred seven".