28219106 has 4 divisors (see below), whose sum is σ = 42328662. Its totient is φ = 14109552.

The previous prime is 28219073. The next prime is 28219153. The reversal of 28219106 is 60191282.

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

It can be written as a sum of positive squares in only one way, i.e., 17598025 + 10621081 = 4195^2 + 3259^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7054775 + ... + 7054778.

Almost surely, 2^28219106 is an apocalyptic number.

28219106 is a deficient number, since it is larger than the sum of its proper divisors (14109556).

28219106 is a wasteful number, since it uses less digits than its factorization.

28219106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14109555.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 28219106 is about 5312.1658483146. The cubic root of 28219106 is about 304.4489054092.

The spelling of 28219106 in words is "twenty-eight million, two hundred nineteen thousand, one hundred six".