28877340 has 96 divisors (see below), whose sum is σ = 86526720. Its totient is φ = 7174656.

The previous prime is 28877327. The next prime is 28877347. The reversal of 28877340 is 4377882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28877347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83047 + ... + 83393.

It is an arithmetic number, because the mean of its divisors is an integer number (901320).

Almost surely, 2^28877340 is an apocalyptic number.

28877340 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 28877340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43263360).

28877340 is an abundant number, since it is smaller than the sum of its proper divisors (57649380).

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

28877340 is a wasteful number, since it uses less digits than its factorization.

28877340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 28877340 is about 5373.7640439454. The cubic root of 28877340 is about 306.7979090633.

The spelling of 28877340 in words is "twenty-eight million, eight hundred seventy-seven thousand, three hundred forty".