28930620 has 48 divisors (see below), whose sum is σ = 81446400. Its totient is φ = 7672896.

The previous prime is 28930613. The next prime is 28930621. The reversal of 28930620 is 2603982.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28930621) 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, 10729 + ... + 13151.

It is an arithmetic number, because the mean of its divisors is an integer number (1696800).

Almost surely, 2^28930620 is an apocalyptic number.

28930620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28930620 is an abundant number, since it is smaller than the sum of its proper divisors (52515780).

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

28930620 is a wasteful number, since it uses less digits than its factorization.

28930620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2634 (or 2632 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 28930620 is about 5378.7191783918. The cubic root of 28930620 is about 306.9864784829.

The spelling of 28930620 in words is "twenty-eight million, nine hundred thirty thousand, six hundred twenty".