228352761 has 24 divisors (see below), whose sum is σ = 405961920. Its totient is φ = 120449376.

The previous prime is 228352759. The next prime is 228352799. The reversal of 228352761 is 167253822.

It is not a de Polignac number, because 228352761 - 2¹ = 228352759 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228352741) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138591 + ... + 140228.

It is an arithmetic number, because the mean of its divisors is an integer number (16915080).

Almost surely, 2^228352761 is an apocalyptic number.

228352761 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

228352761 is a deficient number, since it is larger than the sum of its proper divisors (177609159).

228352761 is a wasteful number, since it uses less digits than its factorization.

228352761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278845 (or 278842 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 228352761 is about 15111.3454397681. The cubic root of 228352761 is about 611.2263789535.

The spelling of 228352761 in words is "two hundred twenty-eight million, three hundred fifty-two thousand, seven hundred sixty-one".