28062731 has 2 divisors, whose sum is σ = 28062732. Its totient is φ = 28062730.

The previous prime is 28062707. The next prime is 28062743. The reversal of 28062731 is 13726082.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28062731 - 2⁶ = 28062667 is a prime.

It is a super-2 number, since 2×28062731² = 1575033742356722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28062694 and 28062703.

It is not a weakly prime, because it can be changed into another prime (28062131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14031365 + 14031366.

It is an arithmetic number, because the mean of its divisors is an integer number (14031366).

Almost surely, 2^28062731 is an apocalyptic number.

28062731 is a deficient number, since it is larger than the sum of its proper divisors (1).

28062731 is an equidigital number, since it uses as much as digits as its factorization.

28062731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 28062731 is about 5297.4268281874. The cubic root of 28062731 is about 303.8854997869.

The spelling of 28062731 in words is "twenty-eight million, sixty-two thousand, seven hundred thirty-one".