28429975 has 12 divisors (see below), whose sum is σ = 40289584. Its totient is φ = 19494720.

The previous prime is 28429963. The next prime is 28429991. The reversal of 28429975 is 57992482.

It is not a de Polignac number, because 28429975 - 2⁵ = 28429943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81054 + ... + 81403.

Almost surely, 2^28429975 is an apocalyptic number.

28429975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28429975 is a deficient number, since it is larger than the sum of its proper divisors (11859609).

28429975 is a wasteful number, since it uses less digits than its factorization.

28429975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162474 (or 162469 counting only the distinct ones).

The product of its digits is 362880, while the sum is 46.

The square root of 28429975 is about 5331.9766503615. The cubic root of 28429975 is about 305.2053620086.

The spelling of 28429975 in words is "twenty-eight million, four hundred twenty-nine thousand, nine hundred seventy-five".