28885620 has 48 divisors (see below), whose sum is σ = 81139968. Its totient is φ = 7678080.

The previous prime is 28885603. The next prime is 28885621. The reversal of 28885620 is 2658882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28885621) 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, 25302 + ... + 26418.

It is an arithmetic number, because the mean of its divisors is an integer number (1690416).

Almost surely, 2^28885620 is an apocalyptic number.

28885620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28885620 is an abundant number, since it is smaller than the sum of its proper divisors (52254348).

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

28885620 is a wasteful number, since it uses less digits than its factorization.

28885620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560 (or 1558 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 28885620 is about 5374.5343984386. The cubic root of 28885620 is about 306.8272289838.

The spelling of 28885620 in words is "twenty-eight million, eight hundred eighty-five thousand, six hundred twenty".