28767928 has 32 divisors (see below), whose sum is σ = 62697600. Its totient is φ = 12118752.

The previous prime is 28767911. The next prime is 28767941. The reversal of 28767928 is 82976782.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 1050 + ... + 7657.

It is an arithmetic number, because the mean of its divisors is an integer number (1959300).

Almost surely, 2^28767928 is an apocalyptic number.

28767928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28767928 is an abundant number, since it is smaller than the sum of its proper divisors (33929672).

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

28767928 is a wasteful number, since it uses less digits than its factorization.

28767928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8779 (or 8775 counting only the distinct ones).

The product of its digits is 677376, while the sum is 49.

The square root of 28767928 is about 5363.5741814577. The cubic root of 28767928 is about 306.4099479349.

The spelling of 28767928 in words is "twenty-eight million, seven hundred sixty-seven thousand, nine hundred twenty-eight".