28074840 has 64 divisors (see below), whose sum is σ = 86952960. Its totient is φ = 7244160.

The previous prime is 28074817. The next prime is 28074841. The reversal of 28074840 is 4847082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28074841) 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, 54 + ... + 7493.

It is an arithmetic number, because the mean of its divisors is an integer number (1358640).

Almost surely, 2^28074840 is an apocalyptic number.

28074840 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 28074840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43476480).

28074840 is an abundant number, since it is smaller than the sum of its proper divisors (58878120).

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

28074840 is a wasteful number, since it uses less digits than its factorization.

28074840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7592 (or 7588 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 28074840 is about 5298.5696183027. The cubic root of 28074840 is about 303.9292021190.

The spelling of 28074840 in words is "twenty-eight million, seventy-four thousand, eight hundred forty".