28219245 has 16 divisors (see below), whose sum is σ = 45771072. Its totient is φ = 14843520.

The previous prime is 28219211. The next prime is 28219277. The reversal of 28219245 is 54291282.

It is not a de Polignac number, because 28219245 - 2⁸ = 28218989 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11791 + ... + 13980.

It is an arithmetic number, because the mean of its divisors is an integer number (2860692).

Almost surely, 2^28219245 is an apocalyptic number.

It is an amenable number.

28219245 is a deficient number, since it is larger than the sum of its proper divisors (17551827).

28219245 is a wasteful number, since it uses less digits than its factorization.

28219245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25852.

The product of its digits is 11520, while the sum is 33.

The square root of 28219245 is about 5312.1789314744. The cubic root of 28219245 is about 304.4494052872.

The spelling of 28219245 in words is "twenty-eight million, two hundred nineteen thousand, two hundred forty-five".