28766940 has 48 divisors (see below), whose sum is σ = 80898048. Its totient is φ = 7637824.

The previous prime is 28766923. The next prime is 28766963. The reversal of 28766940 is 4966782.

It is a junction number, because it is equal to n+sod(n) for n = 28766892 and 28766901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14869 + ... + 16691.

It is an arithmetic number, because the mean of its divisors is an integer number (1685376).

Almost surely, 2^28766940 is an apocalyptic number.

28766940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28766940 is an abundant number, since it is smaller than the sum of its proper divisors (52131108).

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

28766940 is a wasteful number, since it uses less digits than its factorization.

28766940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2098 (or 2096 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 28766940 is about 5363.4820779042. The cubic root of 28766940 is about 306.4064401340.

The spelling of 28766940 in words is "twenty-eight million, seven hundred sixty-six thousand, nine hundred forty".