28802039 has 4 divisors (see below), whose sum is σ = 32916624. Its totient is φ = 24687456.

The previous prime is 28801979. The next prime is 28802071. The reversal of 28802039 is 93020882.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28802039 - 2⁸ = 28801783 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28801996 and 28802014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28802339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2057282 + ... + 2057295.

It is an arithmetic number, because the mean of its divisors is an integer number (8229156).

Almost surely, 2^28802039 is an apocalyptic number.

28802039 is a deficient number, since it is larger than the sum of its proper divisors (4114585).

28802039 is an equidigital number, since it uses as much as digits as its factorization.

28802039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4114584.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 28802039 is about 5366.7531152458. The cubic root of 28802039 is about 306.5310066058.

The spelling of 28802039 in words is "twenty-eight million, eight hundred two thousand, thirty-nine".