28932778 has 16 divisors (see below), whose sum is σ = 51310080. Its totient is φ = 11972016.

The previous prime is 28932769. The next prime is 28932863. The reversal of 28932778 is 87723982.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35226 + ... + 36037.

It is an arithmetic number, because the mean of its divisors is an integer number (3206880).

Almost surely, 2^28932778 is an apocalyptic number.

28932778 is a deficient number, since it is larger than the sum of its proper divisors (22377302).

28932778 is a wasteful number, since it uses less digits than its factorization.

28932778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71301.

The product of its digits is 338688, while the sum is 46.

The square root of 28932778 is about 5378.9197800302. The cubic root of 28932778 is about 306.9941112304.

It can be divided in two parts, 2893 and 2778, that added together give a triangular number (5671 = T₁₀₆).

The spelling of 28932778 in words is "twenty-eight million, nine hundred thirty-two thousand, seven hundred seventy-eight".