28328408 has 8 divisors (see below), whose sum is σ = 53115780. Its totient is φ = 14164200.

The previous prime is 28328407. The next prime is 28328423. The reversal of 28328408 is 80482382.

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 (28328401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1770518 + ... + 1770533.

Almost surely, 2^28328408 is an apocalyptic number.

It is an amenable number.

28328408 is a deficient number, since it is larger than the sum of its proper divisors (24787372).

28328408 is a wasteful number, since it uses less digits than its factorization.

28328408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3541057 (or 3541053 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 28328408 is about 5322.4437996093. The cubic root of 28328408 is about 304.8414763424.

The spelling of 28328408 in words is "twenty-eight million, three hundred twenty-eight thousand, four hundred eight".