228161544 has 32 divisors (see below), whose sum is σ = 614281920. Its totient is φ = 70203456.

The previous prime is 228161537. The next prime is 228161561. The reversal of 228161544 is 445161822.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365332 + ... + 365955.

It is an arithmetic number, because the mean of its divisors is an integer number (19196310).

Almost surely, 2^228161544 is an apocalyptic number.

228161544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

228161544 is an abundant number, since it is smaller than the sum of its proper divisors (386120376).

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

228161544 is a wasteful number, since it uses less digits than its factorization.

228161544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731309 (or 731305 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 228161544 is about 15105.0171797320. The cubic root of 228161544 is about 611.0557226519.

The spelling of 228161544 in words is "two hundred twenty-eight million, one hundred sixty-one thousand, five hundred forty-four".