28138454 has 8 divisors (see below), whose sum is σ = 42253248. Its totient is φ = 14054040.

The previous prime is 28138433. The next prime is 28138471. The reversal of 28138454 is 45483182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5117 + ... + 9080.

It is an arithmetic number, because the mean of its divisors is an integer number (5281656).

Almost surely, 2^28138454 is an apocalyptic number.

28138454 is a deficient number, since it is larger than the sum of its proper divisors (14114794).

28138454 is a wasteful number, since it uses less digits than its factorization.

28138454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15190.

The product of its digits is 30720, while the sum is 35.

The square root of 28138454 is about 5304.5691625239. The cubic root of 28138454 is about 304.1585838681.

The spelling of 28138454 in words is "twenty-eight million, one hundred thirty-eight thousand, four hundred fifty-four".