28738403 has 2 divisors, whose sum is σ = 28738404. Its totient is φ = 28738402.

The previous prime is 28738399. The next prime is 28738429. The reversal of 28738403 is 30483782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28738403 - 2² = 28738399 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (28731403) 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 as a sum of consecutive naturals, namely, 14369201 + 14369202.

It is an arithmetic number, because the mean of its divisors is an integer number (14369202).

Almost surely, 2^28738403 is an apocalyptic number.

28738403 is a deficient number, since it is larger than the sum of its proper divisors (1).

28738403 is an equidigital number, since it uses as much as digits as its factorization.

28738403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 28738403 is about 5360.8211124789. The cubic root of 28738403 is about 306.3050875220.

The spelling of 28738403 in words is "twenty-eight million, seven hundred thirty-eight thousand, four hundred three".