28303916 has 6 divisors (see below), whose sum is σ = 49531860. Its totient is φ = 14151956.

The previous prime is 28303903. The next prime is 28303943. The reversal of 28303916 is 61930382.

It is a super-2 number, since 2×28303916² = 1602223321870112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3537986 + ... + 3537993.

It is an arithmetic number, because the mean of its divisors is an integer number (8255310).

Almost surely, 2^28303916 is an apocalyptic number.

It is an amenable number.

28303916 is a deficient number, since it is larger than the sum of its proper divisors (21227944).

28303916 is a wasteful number, since it uses less digits than its factorization.

28303916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7075983 (or 7075981 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 28303916 is about 5320.1424792951. The cubic root of 28303916 is about 304.7535983584.

The spelling of 28303916 in words is "twenty-eight million, three hundred three thousand, nine hundred sixteen".