28199707 has 2 divisors, whose sum is σ = 28199708. Its totient is φ = 28199706.

The previous prime is 28199683. The next prime is 28199711. The reversal of 28199707 is 70799182.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28199707 - 2¹⁵ = 28166939 is a prime.

It is not a weakly prime, because it can be changed into another prime (28199767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14099853 + 14099854.

It is an arithmetic number, because the mean of its divisors is an integer number (14099854).

Almost surely, 2^28199707 is an apocalyptic number.

28199707 is a deficient number, since it is larger than the sum of its proper divisors (1).

28199707 is an equidigital number, since it uses as much as digits as its factorization.

28199707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 28199707 is about 5310.3396313230. The cubic root of 28199707 is about 304.3791257573.

The spelling of 28199707 in words is "twenty-eight million, one hundred ninety-nine thousand, seven hundred seven".