28930226 has 64 divisors (see below), whose sum is σ = 53434080. Its totient is φ = 11612160.

The previous prime is 28930199. The next prime is 28930229. The reversal of 28930226 is 62203982.

It can be written as a sum of positive squares in 16 ways, for example, as 2253001 + 26677225 = 1501^2 + 5165^2 .

It is a super-2 number, since 2×28930226² = 1673915952822152, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28930192 and 28930201.

It is not an unprimeable number, because it can be changed into a prime (28930229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 474236 + ... + 474296.

Almost surely, 2^28930226 is an apocalyptic number.

28930226 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28930226 is a deficient number, since it is larger than the sum of its proper divisors (24503854).

28930226 is a wasteful number, since it uses less digits than its factorization.

28930226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 28930226 is about 5378.6825524472. The cubic root of 28930226 is about 306.9850848820.

The spelling of 28930226 in words is "twenty-eight million, nine hundred thirty thousand, two hundred twenty-six".