28058920 has 16 divisors (see below), whose sum is σ = 63132660. Its totient is φ = 11223552.

The previous prime is 28058909. The next prime is 28058923. The reversal of 28058920 is 2985082.

It can be written as a sum of positive squares in 2 ways, for example, as 27102436 + 956484 = 5206^2 + 978^2 .

It is not an unprimeable number, because it can be changed into a prime (28058923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350697 + ... + 350776.

Almost surely, 2^28058920 is an apocalyptic number.

28058920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28058920 is an abundant number, since it is smaller than the sum of its proper divisors (35073740).

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

28058920 is a wasteful number, since it uses less digits than its factorization.

28058920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701484 (or 701480 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 28058920 is about 5297.0671130353. The cubic root of 28058920 is about 303.8717429876.

The spelling of 28058920 in words is "twenty-eight million, fifty-eight thousand, nine hundred twenty".