228787645 has 16 divisors (see below), whose sum is σ = 290125440. Its totient is φ = 172718784.

The previous prime is 228787639. The next prime is 228787661. The reversal of 228787645 is 546787822.

228787645 = T₂₁₄₇ + T₂₁₄₈ + ... + T₂₂₄₁.

It is a cyclic number.

It is not a de Polignac number, because 228787645 - 2¹¹ = 228785597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20407 + ... + 29563.

It is an arithmetic number, because the mean of its divisors is an integer number (18132840).

Almost surely, 2^228787645 is an apocalyptic number.

It is an amenable number.

228787645 is a deficient number, since it is larger than the sum of its proper divisors (61337795).

228787645 is a wasteful number, since it uses less digits than its factorization.

228787645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9444.

The product of its digits is 1505280, while the sum is 49.

The square root of 228787645 is about 15125.7279163682. The cubic root of 228787645 is about 611.6141474341.

The spelling of 228787645 in words is "two hundred twenty-eight million, seven hundred eighty-seven thousand, six hundred forty-five".