28486987 has 2 divisors, whose sum is σ = 28486988. Its totient is φ = 28486986.

The previous prime is 28486979. The next prime is 28487033. The reversal of 28486987 is 78968482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28486987 - 2³ = 28486979 is a prime.

It is not a weakly prime, because it can be changed into another prime (28486967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14243493 + 14243494.

It is an arithmetic number, because the mean of its divisors is an integer number (14243494).

Almost surely, 2^28486987 is an apocalyptic number.

28486987 is a deficient number, since it is larger than the sum of its proper divisors (1).

28486987 is an equidigital number, since it uses as much as digits as its factorization.

28486987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1548288, while the sum is 52.

The square root of 28486987 is about 5337.3202077447. The cubic root of 28486987 is about 305.4092401310.

The spelling of 28486987 in words is "twenty-eight million, four hundred eighty-six thousand, nine hundred eighty-seven".