228209040 has 60 divisors (see below), whose sum is σ = 766404444. Its totient is φ = 60855552.

The previous prime is 228209039. The next prime is 228209053. The reversal of 228209040 is 40902822.

It can be written as a sum of positive squares in 2 ways, for example, as 50466816 + 177742224 = 7104^2 + 13332^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a junction number, because it is equal to n+sod(n) for n = 228208995 and 228209013.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157759 + ... + 159198.

Almost surely, 2^228209040 is an apocalyptic number.

228209040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228209040 is an abundant number, since it is smaller than the sum of its proper divisors (538195404).

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

228209040 is a wasteful number, since it uses less digits than its factorization.

228209040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316976 (or 316967 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 228209040 is about 15106.5892907698. The cubic root of 228209040 is about 611.0981205197.

The spelling of 228209040 in words is "two hundred twenty-eight million, two hundred nine thousand, forty".