28502008 has 8 divisors (see below), whose sum is σ = 53441280. Its totient is φ = 14251000.

The previous prime is 28501999. The next prime is 28502009. The reversal of 28502008 is 80020582.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28502009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1781368 + ... + 1781383.

It is an arithmetic number, because the mean of its divisors is an integer number (6680160).

Almost surely, 2^28502008 is an apocalyptic number.

It is an amenable number.

28502008 is a deficient number, since it is larger than the sum of its proper divisors (24939272).

28502008 is a wasteful number, since it uses less digits than its factorization.

28502008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3562757 (or 3562753 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 28502008 is about 5338.7271891341. The cubic root of 28502008 is about 305.4629107901.

The spelling of 28502008 in words is "twenty-eight million, five hundred two thousand, eight".