228166536 has 64 divisors (see below), whose sum is σ = 622137600. Its totient is φ = 69308928.

The previous prime is 228166507. The next prime is 228166591. The reversal of 228166536 is 635661822.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 228166494 and 228166503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20020 + ... + 29276.

It is an arithmetic number, because the mean of its divisors is an integer number (9720900).

Almost surely, 2^228166536 is an apocalyptic number.

228166536 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228166536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311068800).

228166536 is an abundant number, since it is smaller than the sum of its proper divisors (393971064).

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

228166536 is a wasteful number, since it uses less digits than its factorization.

228166536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9358 (or 9354 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 228166536 is about 15105.1824219372. The cubic root of 228166536 is about 611.0601790966.

The spelling of 228166536 in words is "two hundred twenty-eight million, one hundred sixty-six thousand, five hundred thirty-six".