228081564 has 18 divisors (see below), whose sum is σ = 576539600. Its totient is φ = 76027176.

The previous prime is 228081559. The next prime is 228081583. The reversal of 228081564 is 465180822.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 6335599 = 228081564 / (2 + 2 + 8 + 0 + 8 + 1 + 5 + 6 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3167764 + ... + 3167835.

Almost surely, 2^228081564 is an apocalyptic number.

It is an amenable number.

228081564 is an abundant number, since it is smaller than the sum of its proper divisors (348458036).

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

228081564 is a wasteful number, since it uses less digits than its factorization.

228081564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6335609 (or 6335604 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 228081564 is about 15102.3694829652. The cubic root of 228081564 is about 610.9843142577.

The spelling of 228081564 in words is "two hundred twenty-eight million, eighty-one thousand, five hundred sixty-four".