28428713 has 8 divisors (see below), whose sum is σ = 29780736. Its totient is φ = 27086400.

The previous prime is 28428689. The next prime is 28428739. The reversal of 28428713 is 31782482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28428713 - 2⁶ = 28428649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28428793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3953 + ... + 8513.

It is an arithmetic number, because the mean of its divisors is an integer number (3722592).

Almost surely, 2^28428713 is an apocalyptic number.

28428713 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

28428713 is a deficient number, since it is larger than the sum of its proper divisors (1352023).

28428713 is a wasteful number, since it uses less digits than its factorization.

28428713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4855.

The product of its digits is 21504, while the sum is 35.

The square root of 28428713 is about 5331.8583064444. The cubic root of 28428713 is about 305.2008459433.

The spelling of 28428713 in words is "twenty-eight million, four hundred twenty-eight thousand, seven hundred thirteen".