28760531 has 2 divisors, whose sum is σ = 28760532. Its totient is φ = 28760530.

The previous prime is 28760519. The next prime is 28760539. The reversal of 28760531 is 13506782.

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-28760531 is a prime.

It is a super-2 number, since 2×28760531² = 1654336286803922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28760539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14380265 + 14380266.

It is an arithmetic number, because the mean of its divisors is an integer number (14380266).

Almost surely, 2^28760531 is an apocalyptic number.

28760531 is a deficient number, since it is larger than the sum of its proper divisors (1).

28760531 is an equidigital number, since it uses as much as digits as its factorization.

28760531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 28760531 is about 5362.8845782843. The cubic root of 28760531 is about 306.3836836326.

The spelling of 28760531 in words is "twenty-eight million, seven hundred sixty thousand, five hundred thirty-one".