28303964 has 48 divisors (see below), whose sum is σ = 56128128. Its totient is φ = 12400128.

The previous prime is 28303943. The next prime is 28303973. The reversal of 28303964 is 46930382.

It is a happy number.

It is a super-2 number, since 2×28303964² = 1602228756226592, which contains 22 as substring.

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, 90272 + ... + 90584.

It is an arithmetic number, because the mean of its divisors is an integer number (1169336).

Almost surely, 2^28303964 is an apocalyptic number.

It is an amenable number.

28303964 is a deficient number, since it is larger than the sum of its proper divisors (27824164).

28303964 is a wasteful number, since it uses less digits than its factorization.

28303964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414 (or 412 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 28303964 is about 5320.1469904505. The cubic root of 28303964 is about 304.7537706333.

The spelling of 28303964 in words is "twenty-eight million, three hundred three thousand, nine hundred sixty-four".