28414421 has 4 divisors (see below), whose sum is σ = 32473632. Its totient is φ = 24355212.

The previous prime is 28414391. The next prime is 28414423. The reversal of 28414421 is 12441482.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28414421 - 2¹⁴ = 28398037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28414423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2029595 + ... + 2029608.

It is an arithmetic number, because the mean of its divisors is an integer number (8118408).

Almost surely, 2^28414421 is an apocalyptic number.

It is an amenable number.

28414421 is a deficient number, since it is larger than the sum of its proper divisors (4059211).

28414421 is an equidigital number, since it uses as much as digits as its factorization.

28414421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4059210.

The product of its digits is 2048, while the sum is 26.

The square root of 28414421 is about 5330.5178922878. The cubic root of 28414421 is about 305.1496927113.

The spelling of 28414421 in words is "twenty-eight million, four hundred fourteen thousand, four hundred twenty-one".