28381419 has 48 divisors (see below), whose sum is σ = 46949760. Its totient is φ = 16369920.

The previous prime is 28381417. The next prime is 28381439. The reversal of 28381419 is 91418382.

It is not a de Polignac number, because 28381419 - 2¹ = 28381417 is a prime.

It is a super-2 number, since 2×28381419² = 1611009888907122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28381411) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 251107 + ... + 251219.

It is an arithmetic number, because the mean of its divisors is an integer number (978120).

Almost surely, 2^28381419 is an apocalyptic number.

28381419 is a deficient number, since it is larger than the sum of its proper divisors (18568341).

28381419 is a wasteful number, since it uses less digits than its factorization.

28381419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 229 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 28381419 is about 5327.4214212882. The cubic root of 28381419 is about 305.0315079875.

The spelling of 28381419 in words is "twenty-eight million, three hundred eighty-one thousand, four hundred nineteen".