28724435 has 8 divisors (see below), whose sum is σ = 34528896. Its totient is φ = 22939840.

The previous prime is 28724429. The next prime is 28724459. The reversal of 28724435 is 53442782.

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

It is not a de Polignac number, because 28724435 - 2⁴ = 28724419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28724395 and 28724404.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1571 + ... + 7740.

It is an arithmetic number, because the mean of its divisors is an integer number (4316112).

Almost surely, 2^28724435 is an apocalyptic number.

28724435 is a deficient number, since it is larger than the sum of its proper divisors (5804461).

28724435 is an equidigital number, since it uses as much as digits as its factorization.

28724435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9933.

The product of its digits is 53760, while the sum is 35.

The square root of 28724435 is about 5359.5181686417. The cubic root of 28724435 is about 306.2554540192.

The spelling of 28724435 in words is "twenty-eight million, seven hundred twenty-four thousand, four hundred thirty-five".