28419031 has 4 divisors (see below), whose sum is σ = 28451272. Its totient is φ = 28386792.

The previous prime is 28418993. The next prime is 28419047. The reversal of 28419031 is 13091482.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13091482 = 2 ⋅6545741.

It is a cyclic number.

It is not a de Polignac number, because 28419031 - 2⁷ = 28418903 is a prime.

It is a super-2 number, since 2×28419031² = 1615282645957922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28419091) 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, 14760 + ... + 16573.

It is an arithmetic number, because the mean of its divisors is an integer number (7112818).

Almost surely, 2^28419031 is an apocalyptic number.

28419031 is a deficient number, since it is larger than the sum of its proper divisors (32241).

28419031 is an equidigital number, since it uses as much as digits as its factorization.

28419031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32240.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 28419031 is about 5330.9502905204. The cubic root of 28419031 is about 305.1661944730.

The spelling of 28419031 in words is "twenty-eight million, four hundred nineteen thousand, thirty-one".