228391736 has 16 divisors (see below), whose sum is σ = 453425040. Its totient is φ = 107478400.

The previous prime is 228391727. The next prime is 228391769. The reversal of 228391736 is 637193822.

It is a junction number, because it is equal to n+sod(n) for n = 228391693 and 228391702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 839540 + ... + 839811.

It is an arithmetic number, because the mean of its divisors is an integer number (28339065).

Almost surely, 2^228391736 is an apocalyptic number.

It is an amenable number.

228391736 is a deficient number, since it is larger than the sum of its proper divisors (225033304).

228391736 is a wasteful number, since it uses less digits than its factorization.

228391736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1679374 (or 1679370 counting only the distinct ones).

The product of its digits is 108864, while the sum is 41.

The square root of 228391736 is about 15112.6349787190. The cubic root of 228391736 is about 611.2611514590.

The spelling of 228391736 in words is "two hundred twenty-eight million, three hundred ninety-one thousand, seven hundred thirty-six".