228705725 has 12 divisors (see below), whose sum is σ = 285026400. Its totient is φ = 182041200.

The previous prime is 228705671. The next prime is 228705731. The reversal of 228705725 is 527507822.

It is not a de Polignac number, because 228705725 - 2⁸ = 228705469 is a prime.

It is a congruent number.

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, 18011 + ... + 27960.

It is an arithmetic number, because the mean of its divisors is an integer number (23752200).

Almost surely, 2^228705725 is an apocalyptic number.

228705725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

228705725 is a deficient number, since it is larger than the sum of its proper divisors (56320675).

228705725 is a wasteful number, since it uses less digits than its factorization.

228705725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46180 (or 46175 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 228705725 is about 15123.0197050721. The cubic root of 228705725 is about 611.5411402689.

The spelling of 228705725 in words is "two hundred twenty-eight million, seven hundred five thousand, seven hundred twenty-five".