28006620 has 24 divisors (see below), whose sum is σ = 78418704. Its totient is φ = 7468416.

The previous prime is 28006619. The next prime is 28006661. The reversal of 28006620 is 2660082.

It is a congruent number.

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, 233329 + ... + 233448.

It is an arithmetic number, because the mean of its divisors is an integer number (3267446).

Almost surely, 2^28006620 is an apocalyptic number.

28006620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28006620 is an abundant number, since it is smaller than the sum of its proper divisors (50412084).

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

28006620 is a wasteful number, since it uses less digits than its factorization.

28006620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466789 (or 466787 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 28006620 is about 5292.1281163630. The cubic root of 28006620 is about 303.6828265149.

The spelling of 28006620 in words is "twenty-eight million, six thousand, six hundred twenty".