28228702 has 4 divisors (see below), whose sum is σ = 42343056. Its totient is φ = 14114350.

The previous prime is 28228691. The next prime is 28228709. The reversal of 28228702 is 20782282.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28228709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7057174 + ... + 7057177.

It is an arithmetic number, because the mean of its divisors is an integer number (10585764).

Almost surely, 2^28228702 is an apocalyptic number.

28228702 is a deficient number, since it is larger than the sum of its proper divisors (14114354).

28228702 is a wasteful number, since it uses less digits than its factorization.

28228702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14114353.

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 28228702 is about 5313.0689812951. The cubic root of 28228702 is about 304.4834111161.

The spelling of 28228702 in words is "twenty-eight million, two hundred twenty-eight thousand, seven hundred two".