28303029 has 12 divisors (see below), whose sum is σ = 41033356. Its totient is φ = 18798912.

The previous prime is 28303021. The next prime is 28303057. The reversal of 28303029 is 92030382.

It can be written as a sum of positive squares in 2 ways, for example, as 6260004 + 22043025 = 2502^2 + 4695^2 .

It is not a de Polignac number, because 28303029 - 2³ = 28303021 is a prime.

It is a super-2 number, since 2×28303029² = 1602122901149682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28302993 and 28303011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28303021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3184 + ... + 8169.

Almost surely, 2^28303029 is an apocalyptic number.

It is an amenable number.

28303029 is a deficient number, since it is larger than the sum of its proper divisors (12730327).

28303029 is a wasteful number, since it uses less digits than its factorization.

28303029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11636 (or 11633 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 28303029 is about 5320.0591162129. The cubic root of 28303029 is about 304.7504148264.

The spelling of 28303029 in words is "twenty-eight million, three hundred three thousand, twenty-nine".