28446628 has 24 divisors (see below), whose sum is σ = 57310400. Its totient is φ = 12102048.

The previous prime is 28446619. The next prime is 28446683. The reversal of 28446628 is 82664482.

It is an unprimeable number.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238 + ... + 7546.

Almost surely, 2^28446628 is an apocalyptic number.

28446628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28446628 is an abundant number, since it is smaller than the sum of its proper divisors (28863772).

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

28446628 is a wasteful number, since it uses less digits than its factorization.

28446628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7459 (or 7457 counting only the distinct ones).

The product of its digits is 147456, while the sum is 40.

The square root of 28446628 is about 5333.5380377382. The cubic root of 28446628 is about 305.2649422325.

The spelling of 28446628 in words is "twenty-eight million, four hundred forty-six thousand, six hundred twenty-eight".