28782906 has 32 divisors (see below), whose sum is σ = 60298560. Its totient is φ = 9147264.

The previous prime is 28782889. The next prime is 28782917. The reversal of 28782906 is 60928782.

It is a happy number.

It is a Curzon 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, 13446 + ... + 15438.

It is an arithmetic number, because the mean of its divisors is an integer number (1884330).

Almost surely, 2^28782906 is an apocalyptic number.

28782906 is an abundant number, since it is smaller than the sum of its proper divisors (31515654).

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

28782906 is a wasteful number, since it uses less digits than its factorization.

28782906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 28782906 is about 5364.9702701879. The cubic root of 28782906 is about 306.4631160780.

The spelling of 28782906 in words is "twenty-eight million, seven hundred eighty-two thousand, nine hundred six".