28490369 has 2 divisors, whose sum is σ = 28490370. Its totient is φ = 28490368.

The previous prime is 28490347. The next prime is 28490389. The reversal of 28490369 is 96309482.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26915344 + 1575025 = 5188^2 + 1255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28490369 is a prime.

It is a super-2 number, since 2×28490369² = 1623402251512322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28490389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14245184 + 14245185.

It is an arithmetic number, because the mean of its divisors is an integer number (14245185).

Almost surely, 2^28490369 is an apocalyptic number.

It is an amenable number.

28490369 is a deficient number, since it is larger than the sum of its proper divisors (1).

28490369 is an equidigital number, since it uses as much as digits as its factorization.

28490369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 28490369 is about 5337.6370240023. The cubic root of 28490369 is about 305.4213258034.

The spelling of 28490369 in words is "twenty-eight million, four hundred ninety thousand, three hundred sixty-nine".