28928142 has 24 divisors (see below), whose sum is σ = 63862344. Its totient is φ = 9460464.

The previous prime is 28928129. The next prime is 28928143. The reversal of 28928142 is 24182982.

It is a junction number, because it is equal to n+sod(n) for n = 28928097 and 28928106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28928143) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 14208 + ... + 16115.

It is an arithmetic number, because the mean of its divisors is an integer number (2660931).

Almost surely, 2^28928142 is an apocalyptic number.

28928142 is an abundant number, since it is smaller than the sum of its proper divisors (34934202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28928142 is a wasteful number, since it uses less digits than its factorization.

28928142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30384 (or 30381 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 28928142 is about 5378.4888212211. The cubic root of 28928142 is about 306.9777134419.

It can be divided in two parts, 2 and 8928142, that added together give a square (8928144 = 2988²).

The spelling of 28928142 in words is "twenty-eight million, nine hundred twenty-eight thousand, one hundred forty-two".