28407776 has 12 divisors (see below), whose sum is σ = 55927872. Its totient is φ = 14203872.

The previous prime is 28407763. The next prime is 28407839. The reversal of 28407776 is 67770482.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 443840 + ... + 443903.

It is an arithmetic number, because the mean of its divisors is an integer number (4660656).

Almost surely, 2^28407776 is an apocalyptic number.

It is an amenable number.

28407776 is a deficient number, since it is larger than the sum of its proper divisors (27520096).

28407776 is an equidigital number, since it uses as much as digits as its factorization.

28407776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887753 (or 887745 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 41.

The square root of 28407776 is about 5329.8945580565. The cubic root of 28407776 is about 305.1259034085.

The spelling of 28407776 in words is "twenty-eight million, four hundred seven thousand, seven hundred seventy-six".