28746393 has 36 divisors (see below), whose sum is σ = 43612560. Its totient is φ = 16829280.

The previous prime is 28746391. The next prime is 28746397. The reversal of 28746393 is 39364782.

It is not a de Polignac number, because 28746393 - 2¹ = 28746391 is a prime.

It is a super-2 number, since 2×28746393² = 1652710221020898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28746391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 487198 + ... + 487256.

It is an arithmetic number, because the mean of its divisors is an integer number (1211460).

Almost surely, 2^28746393 is an apocalyptic number.

It is an amenable number.

28746393 is a deficient number, since it is larger than the sum of its proper divisors (14866167).

28746393 is a wasteful number, since it uses less digits than its factorization.

28746393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 106 counting only the distinct ones).

The product of its digits is 217728, while the sum is 42.

The square root of 28746393 is about 5361.5662823470. The cubic root of 28746393 is about 306.3334717352. Note that the first 3 decimals are identical.

The spelling of 28746393 in words is "twenty-eight million, seven hundred forty-six thousand, three hundred ninety-three".