28915429 has 4 divisors (see below), whose sum is σ = 29022400. Its totient is φ = 28808460.

The previous prime is 28915427. The next prime is 28915441. The reversal of 28915429 is 92451982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28915429 - 2¹ = 28915427 is a prime.

It is a super-2 number, since 2×28915429² = 1672204068508082, 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 = 28915391 and 28915400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28915423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53079 + ... + 53620.

It is an arithmetic number, because the mean of its divisors is an integer number (7255600).

Almost surely, 2^28915429 is an apocalyptic number.

It is an amenable number.

28915429 is a deficient number, since it is larger than the sum of its proper divisors (106971).

28915429 is a wasteful number, since it uses less digits than its factorization.

28915429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106970.

The product of its digits is 51840, while the sum is 40.

The square root of 28915429 is about 5377.3068538070. The cubic root of 28915429 is about 306.9327378664.

The spelling of 28915429 in words is "twenty-eight million, nine hundred fifteen thousand, four hundred twenty-nine".