28703069 has 4 divisors (see below), whose sum is σ = 29692860. Its totient is φ = 27713280.

The previous prime is 28703063. The next prime is 28703093. The reversal of 28703069 is 96030782.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9078169 + 19624900 = 3013^2 + 4430^2 .

It is a cyclic number.

It is not a de Polignac number, because 28703069 - 2⁸ = 28702813 is a prime.

It is a super-2 number, since 2×28703069² = 1647732340037522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28703063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494852 + ... + 494909.

It is an arithmetic number, because the mean of its divisors is an integer number (7423215).

Almost surely, 2^28703069 is an apocalyptic number.

28703069 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

28703069 is a deficient number, since it is larger than the sum of its proper divisors (989791).

28703069 is an equidigital number, since it uses as much as digits as its factorization.

28703069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989790.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 28703069 is about 5357.5245216424. The cubic root of 28703069 is about 306.1795015291.

The spelling of 28703069 in words is "twenty-eight million, seven hundred three thousand, sixty-nine".