28874340 has 96 divisors (see below), whose sum is σ = 98017920. Its totient is φ = 6998400.

The previous prime is 28874333. The next prime is 28874353. The reversal of 28874340 is 4347882.

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

It is a junction number, because it is equal to n+sod(n) for n = 28874295 and 28874304.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3510 + ... + 8370.

It is an arithmetic number, because the mean of its divisors is an integer number (1021020).

Almost surely, 2^28874340 is an apocalyptic number.

28874340 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 28874340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49008960).

28874340 is an abundant number, since it is smaller than the sum of its proper divisors (69143580).

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

28874340 is a wasteful number, since it uses less digits than its factorization.

28874340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4890 (or 4882 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 28874340 is about 5373.4849027424. The cubic root of 28874340 is about 306.7872845205.

It can be divided in two parts, 2887 and 4340, that added together give a palindrome (7227).

The spelling of 28874340 in words is "twenty-eight million, eight hundred seventy-four thousand, three hundred forty".