28087802 has 4 divisors (see below), whose sum is σ = 42131706. Its totient is φ = 14043900.

The previous prime is 28087799. The next prime is 28087819. The reversal of 28087802 is 20878082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20878082 = 2 ⋅10439041.

It can be written as a sum of positive squares in only one way, i.e., 27867841 + 219961 = 5279^2 + 469^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7021949 + ... + 7021952.

Almost surely, 2^28087802 is an apocalyptic number.

28087802 is a deficient number, since it is larger than the sum of its proper divisors (14043904).

28087802 is a wasteful number, since it uses less digits than its factorization.

28087802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14043903.

The product of its (nonzero) digits is 14336, while the sum is 35.

The square root of 28087802 is about 5299.7926374529. The cubic root of 28087802 is about 303.9759690723.

The spelling of 28087802 in words is "twenty-eight million, eighty-seven thousand, eight hundred two".