28746493 has 2 divisors, whose sum is σ = 28746494. Its totient is φ = 28746492.

The previous prime is 28746463. The next prime is 28746499. The reversal of 28746493 is 39464782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28334329 + 412164 = 5323^2 + 642^2 .

It is a cyclic number.

It is not a de Polignac number, because 28746493 - 2¹³ = 28738301 is a prime.

It is equal to p_1784977 and since 28746493 and 1784977 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28746499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14373246 + 14373247.

It is an arithmetic number, because the mean of its divisors is an integer number (14373247).

Almost surely, 2^28746493 is an apocalyptic number.

It is an amenable number.

28746493 is a deficient number, since it is larger than the sum of its proper divisors (1).

28746493 is an equidigital number, since it uses as much as digits as its factorization.

28746493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 43.

The square root of 28746493 is about 5361.5756079720. The cubic root of 28746493 is about 306.3338269486. Note that the first 3 decimals are identical.

The spelling of 28746493 in words is "twenty-eight million, seven hundred forty-six thousand, four hundred ninety-three".