28378154 has 12 divisors (see below), whose sum is σ = 49517154. Its totient is φ = 12162024.

The previous prime is 28378139. The next prime is 28378171. The reversal of 28378154 is 45187382.

It can be written as a sum of positive squares in only one way, i.e., 28376929 + 1225 = 5327^2 + 35^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 144689 + ... + 144884.

Almost surely, 2^28378154 is an apocalyptic number.

28378154 is a deficient number, since it is larger than the sum of its proper divisors (21139000).

28378154 is a wasteful number, since it uses less digits than its factorization.

28378154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289589 (or 289582 counting only the distinct ones).

The product of its digits is 53760, while the sum is 38.

The square root of 28378154 is about 5327.1149790482. The cubic root of 28378154 is about 305.0198105917.

The spelling of 28378154 in words is "twenty-eight million, three hundred seventy-eight thousand, one hundred fifty-four".