28915029 has 32 divisors (see below), whose sum is σ = 50332800. Its totient is φ = 16174080.

The previous prime is 28915013. The next prime is 28915031. The reversal of 28915029 is 92051982.

It is not a de Polignac number, because 28915029 - 2⁴ = 28915013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28914984 and 28915002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28915039) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117 + ... + 7605.

It is an arithmetic number, because the mean of its divisors is an integer number (1572900).

Almost surely, 2^28915029 is an apocalyptic number.

It is an amenable number.

28915029 is a deficient number, since it is larger than the sum of its proper divisors (21417771).

28915029 is a wasteful number, since it uses less digits than its factorization.

28915029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7522 (or 7516 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 28915029 is about 5377.2696603388. The cubic root of 28915029 is about 306.9313225475.

The spelling of 28915029 in words is "twenty-eight million, nine hundred fifteen thousand, twenty-nine".