228787646 has 4 divisors (see below), whose sum is σ = 343181472. Its totient is φ = 114393822.

The previous prime is 228787639. The next prime is 228787661. The reversal of 228787646 is 646787822.

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

It is a junction number, because it is equal to n+sod(n) for n = 228787594 and 228787603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57196910 + ... + 57196913.

It is an arithmetic number, because the mean of its divisors is an integer number (85795368).

Almost surely, 2^228787646 is an apocalyptic number.

228787646 is a deficient number, since it is larger than the sum of its proper divisors (114393826).

228787646 is a wasteful number, since it uses less digits than its factorization.

228787646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114393825.

The product of its digits is 1806336, while the sum is 50.

The square root of 228787646 is about 15125.7279494245. The cubic root of 228787646 is about 611.6141483252.

The spelling of 228787646 in words is "two hundred twenty-eight million, seven hundred eighty-seven thousand, six hundred forty-six".