28034380 has 48 divisors (see below), whose sum is σ = 65308320. Its totient is φ = 10022400.

The previous prime is 28034371. The next prime is 28034389. The reversal of 28034380 is 8343082.

It is an interprime number because it is at equal distance from previous prime (28034371) and next prime (28034389).

It is not an unprimeable number, because it can be changed into a prime (28034389) 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 15 ways as a sum of consecutive naturals, for example, 12376 + ... + 14464.

It is an arithmetic number, because the mean of its divisors is an integer number (1360590).

Almost surely, 2^28034380 is an apocalyptic number.

28034380 is a gapful number since it is divisible by the number (20) 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 28034380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32654160).

28034380 is an abundant number, since it is smaller than the sum of its proper divisors (37273940).

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

28034380 is a wasteful number, since it uses less digits than its factorization.

28034380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2170 (or 2168 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 28034380 is about 5294.7502301808. The cubic root of 28034380 is about 303.7831296035.

The spelling of 28034380 in words is "twenty-eight million, thirty-four thousand, three hundred eighty".