28575403 has 2 divisors, whose sum is σ = 28575404. Its totient is φ = 28575402.

The previous prime is 28575377. The next prime is 28575409. The reversal of 28575403 is 30457582.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28575403 is a prime.

It is a super-2 number, since 2×28575403² = 1633107313224818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28575409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14287701 + 14287702.

It is an arithmetic number, because the mean of its divisors is an integer number (14287702).

Almost surely, 2^28575403 is an apocalyptic number.

28575403 is a deficient number, since it is larger than the sum of its proper divisors (1).

28575403 is an equidigital number, since it uses as much as digits as its factorization.

28575403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 28575403 is about 5345.5965990711. The cubic root of 28575403 is about 305.7248833717.

The spelling of 28575403 in words is "twenty-eight million, five hundred seventy-five thousand, four hundred three".