228671643990 has 32 divisors (see below), whose sum is σ = 549480472416. Its totient is φ = 60904824320.

The previous prime is 228671643989. The next prime is 228671644007. The reversal of 228671643990 is 99346176822.

It is a self number, because there is not a number n which added to its sum of digits gives 228671643990.

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, 4617507 + ... + 4666766.

It is an arithmetic number, because the mean of its divisors is an integer number (17171264763).

Almost surely, 2^228671643990 is an apocalyptic number.

228671643990 is an abundant number, since it is smaller than the sum of its proper divisors (320808828426).

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

228671643990 is a wasteful number, since it uses less digits than its factorization.

228671643990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9285104.

The product of its (nonzero) digits is 7838208, while the sum is 57.

The spelling of 228671643990 in words is "two hundred twenty-eight billion, six hundred seventy-one million, six hundred forty-three thousand, nine hundred ninety".