228660025 has 48 divisors (see below), whose sum is σ = 322711488. Its totient is φ = 159264000.

The previous prime is 228660023. The next prime is 228660059. The reversal of 228660025 is 520066822.

It is not a de Polignac number, because 228660025 - 2¹ = 228660023 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228660023) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 721167 + ... + 721483.

It is an arithmetic number, because the mean of its divisors is an integer number (6723156).

Almost surely, 2^228660025 is an apocalyptic number.

228660025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

228660025 is a deficient number, since it is larger than the sum of its proper divisors (94051463).

228660025 is a wasteful number, since it uses less digits than its factorization.

228660025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442 (or 437 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 228660025 is about 15121.5086879584. The cubic root of 228660025 is about 611.5004048191.

The spelling of 228660025 in words is "two hundred twenty-eight million, six hundred sixty thousand, twenty-five".