28621308 has 48 divisors (see below), whose sum is σ = 70447104. Its totient is φ = 9030720.

The previous prime is 28621301. The next prime is 28621337. The reversal of 28621308 is 80312682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28621301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16666 + ... + 18302.

It is an arithmetic number, because the mean of its divisors is an integer number (1467648).

Almost surely, 2^28621308 is an apocalyptic number.

It is an amenable number.

28621308 is an abundant number, since it is smaller than the sum of its proper divisors (41825796).

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

28621308 is a wasteful number, since it uses less digits than its factorization.

28621308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722 (or 1720 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 28621308 is about 5349.8885969710. Note that the first 3 decimals coincide. The cubic root of 28621308 is about 305.8885065214. Note that the first 3 decimals are identical.

The spelling of 28621308 in words is "twenty-eight million, six hundred twenty-one thousand, three hundred eight".