28952909 has 2 divisors, whose sum is σ = 28952910. Its totient is φ = 28952908.

The previous prime is 28952899. The next prime is 28952927. The reversal of 28952909 is 90925982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21362884 + 7590025 = 4622^2 + 2755^2 .

It is a cyclic number.

It is not a de Polignac number, because 28952909 - 2¹⁶ = 28887373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28952909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28952939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14476454 + 14476455.

It is an arithmetic number, because the mean of its divisors is an integer number (14476455).

Almost surely, 2^28952909 is an apocalyptic number.

It is an amenable number.

28952909 is a deficient number, since it is larger than the sum of its proper divisors (1).

28952909 is an equidigital number, since it uses as much as digits as its factorization.

28952909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 28952909 is about 5380.7907411458. The cubic root of 28952909 is about 307.0652953809.

The spelling of 28952909 in words is "twenty-eight million, nine hundred fifty-two thousand, nine hundred nine".