28432396 has 12 divisors (see below), whose sum is σ = 49966560. Its totient is φ = 14156240.

The previous prime is 28432373. The next prime is 28432403. The reversal of 28432396 is 69323482.

It is a super-2 number, since 2×28432396² = 1616802284601632, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13915 + ... + 15826.

It is an arithmetic number, because the mean of its divisors is an integer number (4163880).

Almost surely, 2^28432396 is an apocalyptic number.

It is an amenable number.

28432396 is a deficient number, since it is larger than the sum of its proper divisors (21534164).

28432396 is a wasteful number, since it uses less digits than its factorization.

28432396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29984 (or 29982 counting only the distinct ones).

The product of its digits is 62208, while the sum is 37.

The square root of 28432396 is about 5332.2036720290. The cubic root of 28432396 is about 305.2140251796.

The spelling of 28432396 in words is "twenty-eight million, four hundred thirty-two thousand, three hundred ninety-six".