28909419 has 16 divisors (see below), whose sum is σ = 48057600. Its totient is φ = 15017760.

The previous prime is 28909409. The next prime is 28909451. The reversal of 28909419 is 91490982.

It is not a de Polignac number, because 28909419 - 2¹¹ = 28907371 is a prime.

It is a super-2 number, since 2×28909419² = 1671509013835122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28909409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62344 + ... + 62805.

It is an arithmetic number, because the mean of its divisors is an integer number (3003600).

Almost surely, 2^28909419 is an apocalyptic number.

28909419 is a deficient number, since it is larger than the sum of its proper divisors (19148181).

28909419 is a wasteful number, since it uses less digits than its factorization.

28909419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125170.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 28909419 is about 5376.7479948385. The cubic root of 28909419 is about 306.9114713242.

The spelling of 28909419 in words is "twenty-eight million, nine hundred nine thousand, four hundred nineteen".