28036387 has 12 divisors (see below), whose sum is σ = 29303640. Its totient is φ = 26815488.

The previous prime is 28036363. The next prime is 28036391. The reversal of 28036387 is 78363082.

It is not a de Polignac number, because 28036387 - 2⁷ = 28036259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28036187) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108963 + ... + 109219.

It is an arithmetic number, because the mean of its divisors is an integer number (2441970).

Almost surely, 2^28036387 is an apocalyptic number.

28036387 is a deficient number, since it is larger than the sum of its proper divisors (1267253).

28036387 is an equidigital number, since it uses as much as digits as its factorization.

28036387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 28036387 is about 5294.9397541426. The cubic root of 28036387 is about 303.7903787763.

The spelling of 28036387 in words is "twenty-eight million, thirty-six thousand, three hundred eighty-seven".