28726487 has 2 divisors, whose sum is σ = 28726488. Its totient is φ = 28726486.

The previous prime is 28726463. The next prime is 28726493. The reversal of 28726487 is 78462782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28726487 - 2¹⁸ = 28464343 is a prime.

It is a super-2 number, since 2×28726487² = 1650422110722338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28720487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14363243 + 14363244.

It is an arithmetic number, because the mean of its divisors is an integer number (14363244).

Almost surely, 2^28726487 is an apocalyptic number.

28726487 is a deficient number, since it is larger than the sum of its proper divisors (1).

28726487 is an equidigital number, since it uses as much as digits as its factorization.

28726487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 301056, while the sum is 44.

The square root of 28726487 is about 5359.7096003422. The cubic root of 28726487 is about 306.2627465471.

The spelling of 28726487 in words is "twenty-eight million, seven hundred twenty-six thousand, four hundred eighty-seven".