28903668 has 12 divisors (see below), whose sum is σ = 67441920. Its totient is φ = 9634552.

The previous prime is 28903657. The next prime is 28903673. The reversal of 28903668 is 86630982.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1204308 + ... + 1204331.

It is an arithmetic number, because the mean of its divisors is an integer number (5620160).

Almost surely, 2^28903668 is an apocalyptic number.

It is an amenable number.

28903668 is an abundant number, since it is smaller than the sum of its proper divisors (38538252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28903668 is a wasteful number, since it uses less digits than its factorization.

28903668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408646 (or 2408644 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 28903668 is about 5376.2131654167. The cubic root of 28903668 is about 306.8911185005.

The spelling of 28903668 in words is "twenty-eight million, nine hundred three thousand, six hundred sixty-eight".