28730226 has 16 divisors (see below), whose sum is σ = 65669184. Its totient is φ = 8208624.

The previous prime is 28730183. The next prime is 28730231. The reversal of 28730226 is 62203782.

It is a super-2 number, since 2×28730226² = 1650851772022152, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28730193 and 28730202.

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, 341985 + ... + 342068.

It is an arithmetic number, because the mean of its divisors is an integer number (4104324).

Almost surely, 2^28730226 is an apocalyptic number.

28730226 is an abundant number, since it is smaller than the sum of its proper divisors (36938958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28730226 is a wasteful number, since it uses less digits than its factorization.

28730226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684065.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 28730226 is about 5360.0583952043. The cubic root of 28730226 is about 306.2760335498.

The spelling of 28730226 in words is "twenty-eight million, seven hundred thirty thousand, two hundred twenty-six".