28441740 has 24 divisors (see below), whose sum is σ = 79637040. Its totient is φ = 7584448.

The previous prime is 28441739. The next prime is 28441747. The reversal of 28441740 is 4714482.

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

It is a junction number, because it is equal to n+sod(n) for n = 28441698 and 28441707.

It is not an unprimeable number, because it can be changed into a prime (28441747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236955 + ... + 237074.

It is an arithmetic number, because the mean of its divisors is an integer number (3318210).

Almost surely, 2^28441740 is an apocalyptic number.

28441740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28441740 is an abundant number, since it is smaller than the sum of its proper divisors (51195300).

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

28441740 is a wasteful number, since it uses less digits than its factorization.

28441740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474041 (or 474039 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 28441740 is about 5333.0797856398. The cubic root of 28441740 is about 305.2474566157.

It can be divided in two parts, 284 and 41740, that added together give a palindrome (42024).

The spelling of 28441740 in words is "twenty-eight million, four hundred forty-one thousand, seven hundred forty".