28840704 has 108 divisors (see below), whose sum is σ = 83039544. Its totient is φ = 8855552.

The previous prime is 28840699. The next prime is 28840769. The reversal of 28840704 is 40704882.

28840704 = T₁₃₇ + T₁₃₈ + ... + T₅₅₉.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 613609 + ... + 613655.

Almost surely, 2^28840704 is an apocalyptic number.

28840704 is a gapful number since it is divisible by the number (24) 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 28840704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41519772).

28840704 is an abundant number, since it is smaller than the sum of its proper divisors (54198840).

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

28840704 is an equidigital number, since it uses as much as digits as its factorization.

28840704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 69 counting only the distinct ones).

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

The square root of 28840704 is about 5370.3541782642. The cubic root of 28840704 is about 306.6681117344.

The spelling of 28840704 in words is "twenty-eight million, eight hundred forty thousand, seven hundred four".