28948415 has 4 divisors (see below), whose sum is σ = 34738104. Its totient is φ = 23158728.

The previous prime is 28948411. The next prime is 28948429. The reversal of 28948415 is 51484982.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28948415 - 2² = 28948411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28948411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2894837 + ... + 2894846.

It is an arithmetic number, because the mean of its divisors is an integer number (8684526).

Almost surely, 2^28948415 is an apocalyptic number.

28948415 is a deficient number, since it is larger than the sum of its proper divisors (5789689).

28948415 is an equidigital number, since it uses as much as digits as its factorization.

28948415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5789688.

The product of its digits is 92160, while the sum is 41.

The square root of 28948415 is about 5380.3731283248. The cubic root of 28948415 is about 307.0494072498.

The spelling of 28948415 in words is "twenty-eight million, nine hundred forty-eight thousand, four hundred fifteen".