28126929 has 8 divisors (see below), whose sum is σ = 37532320. Its totient is φ = 18736416.

The previous prime is 28126913. The next prime is 28126949. The reversal of 28126929 is 92962182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28126929 - 2⁴ = 28126913 is a prime.

It is a super-2 number, since 2×28126929² = 1582248269942082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28126949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1914 + ... + 7740.

It is an arithmetic number, because the mean of its divisors is an integer number (4691540).

Almost surely, 2^28126929 is an apocalyptic number.

It is an amenable number.

28126929 is a deficient number, since it is larger than the sum of its proper divisors (9405391).

28126929 is a wasteful number, since it uses less digits than its factorization.

28126929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7439.

The product of its digits is 31104, while the sum is 39.

The square root of 28126929 is about 5303.4827236449. The cubic root of 28126929 is about 304.1170522524.

The spelling of 28126929 in words is "twenty-eight million, one hundred twenty-six thousand, nine hundred twenty-nine".