28207408 has 10 divisors (see below), whose sum is σ = 54651884. Its totient is φ = 14103696.

The previous prime is 28207397. The next prime is 28207423. The reversal of 28207408 is 80470282.

It is a self number, because there is not a number n which added to its sum of digits gives 28207408.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 881466 + ... + 881497.

Almost surely, 2^28207408 is an apocalyptic number.

It is an amenable number.

28207408 is a deficient number, since it is larger than the sum of its proper divisors (26444476).

28207408 is a wasteful number, since it uses less digits than its factorization.

28207408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762971 (or 1762965 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 28207408 is about 5311.0646766915. The cubic root of 28207408 is about 304.4068306587.

The spelling of 28207408 in words is "twenty-eight million, two hundred seven thousand, four hundred eight".