28908620 has 24 divisors (see below), whose sum is σ = 65378544. Its totient is φ = 10673856.

The previous prime is 28908617. The next prime is 28908641. The reversal of 28908620 is 2680982.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55334 + ... + 55853.

It is an arithmetic number, because the mean of its divisors is an integer number (2724106).

Almost surely, 2^28908620 is an apocalyptic number.

28908620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28908620 is an abundant number, since it is smaller than the sum of its proper divisors (36469924).

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

28908620 is a wasteful number, since it uses less digits than its factorization.

28908620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111209 (or 111207 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 28908620 is about 5376.6736929072. The cubic root of 28908620 is about 306.9086438199.

The spelling of 28908620 in words is "twenty-eight million, nine hundred eight thousand, six hundred twenty".