28500154 has 4 divisors (see below), whose sum is σ = 42750234. Its totient is φ = 14250076.

The previous prime is 28500139. The next prime is 28500163. The reversal of 28500154 is 45100582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45100582 = 2 ⋅22550291.

It can be written as a sum of positive squares in only one way, i.e., 24235929 + 4264225 = 4923^2 + 2065^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 7125037 + ... + 7125040.

Almost surely, 2^28500154 is an apocalyptic number.

28500154 is a deficient number, since it is larger than the sum of its proper divisors (14250080).

28500154 is a wasteful number, since it uses less digits than its factorization.

28500154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14250079.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 28500154 is about 5338.5535494177. The cubic root of 28500154 is about 305.4562873911.

The spelling of 28500154 in words is "twenty-eight million, five hundred thousand, one hundred fifty-four".