28370929 has 2 divisors, whose sum is σ = 28370930. Its totient is φ = 28370928.

The previous prime is 28370887. The next prime is 28370957. The reversal of 28370929 is 92907382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18258529 + 10112400 = 4273^2 + 3180^2 .

It is a cyclic number.

It is not a de Polignac number, because 28370929 - 2⁹ = 28370417 is a prime.

It is a super-2 number, since 2×28370929² = 1609819224646082, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28370891 and 28370900.

It is not a weakly prime, because it can be changed into another prime (28370959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14185464 + 14185465.

It is an arithmetic number, because the mean of its divisors is an integer number (14185465).

Almost surely, 2^28370929 is an apocalyptic number.

It is an amenable number.

28370929 is a deficient number, since it is larger than the sum of its proper divisors (1).

28370929 is an equidigital number, since it uses as much as digits as its factorization.

28370929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 28370929 is about 5326.4368014649. The cubic root of 28370929 is about 304.9939226595.

The spelling of 28370929 in words is "twenty-eight million, three hundred seventy thousand, nine hundred twenty-nine".