28930356 has 72 divisors (see below), whose sum is σ = 90015744. Its totient is φ = 7629120.

The previous prime is 28930351. The next prime is 28930361. The reversal of 28930356 is 65303982.

It is an interprime number because it is at equal distance from previous prime (28930351) and next prime (28930361).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28930356.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28930351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1140 + ... + 7691.

Almost surely, 2^28930356 is an apocalyptic number.

28930356 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28930356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45007872).

28930356 is an abundant number, since it is smaller than the sum of its proper divisors (61085388).

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

28930356 is a wasteful number, since it uses less digits than its factorization.

28930356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8861 (or 8856 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 28930356 is about 5378.6946371773. The cubic root of 28930356 is about 306.9855447009.

The spelling of 28930356 in words is "twenty-eight million, nine hundred thirty thousand, three hundred fifty-six".