228725240 has 16 divisors (see below), whose sum is σ = 514631880. Its totient is φ = 91490080.

The previous prime is 228725219. The next prime is 228725251. The reversal of 228725240 is 42527822.

It is a junction number, because it is equal to n+sod(n) for n = 228725197 and 228725206.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 2859026 + ... + 2859105.

Almost surely, 2^228725240 is an apocalyptic number.

228725240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228725240 is an abundant number, since it is smaller than the sum of its proper divisors (285906640).

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

228725240 is a wasteful number, since it uses less digits than its factorization.

228725240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5718142 (or 5718138 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 228725240 is about 15123.6648997523. The cubic root of 228725240 is about 611.5585336332.

The spelling of 228725240 in words is "two hundred twenty-eight million, seven hundred twenty-five thousand, two hundred forty".