28872419 has 6 divisors (see below), whose sum is σ = 30472380. Its totient is φ = 27352476.

The previous prime is 28872413. The next prime is 28872427. The reversal of 28872419 is 91427882.

It is not a de Polignac number, because 28872419 - 2²⁴ = 12095203 is a prime.

It is a super-2 number, since 2×28872419² = 1667233157823122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28872413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39629 + ... + 40350.

It is an arithmetic number, because the mean of its divisors is an integer number (5078730).

Almost surely, 2^28872419 is an apocalyptic number.

28872419 is a deficient number, since it is larger than the sum of its proper divisors (1599961).

28872419 is an equidigital number, since it uses as much as digits as its factorization.

28872419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80017 (or 79998 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 28872419 is about 5373.3061517096. The cubic root of 28872419 is about 306.7804808852.

The spelling of 28872419 in words is "twenty-eight million, eight hundred seventy-two thousand, four hundred nineteen".