28932780 has 24 divisors (see below), whose sum is σ = 81011952. Its totient is φ = 7715392.

The previous prime is 28932769. The next prime is 28932863. The reversal of 28932780 is 8723982.

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, 241047 + ... + 241166.

It is an arithmetic number, because the mean of its divisors is an integer number (3375498).

Almost surely, 2^28932780 is an apocalyptic number.

28932780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28932780 is an abundant number, since it is smaller than the sum of its proper divisors (52079172).

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

28932780 is a wasteful number, since it uses less digits than its factorization.

28932780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482225 (or 482223 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 28932780 is about 5378.9199659411. The cubic root of 28932780 is about 306.9941183041.

The spelling of 28932780 in words is "twenty-eight million, nine hundred thirty-two thousand, seven hundred eighty".