228391457 has 8 divisors (see below), whose sum is σ = 274756800. Its totient is φ = 185460624.

The previous prime is 228391441. The next prime is 228391459. The reversal of 228391457 is 754193822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 228391457 - 2⁴ = 228391441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228391459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 858482 + ... + 858747.

It is an arithmetic number, because the mean of its divisors is an integer number (34344600).

Almost surely, 2^228391457 is an apocalyptic number.

It is an amenable number.

228391457 is a deficient number, since it is larger than the sum of its proper divisors (46365343).

228391457 is a wasteful number, since it uses less digits than its factorization.

228391457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717255.

The product of its digits is 120960, while the sum is 41.

The square root of 228391457 is about 15112.6257480294. The cubic root of 228391457 is about 611.2609025563.

The spelling of 228391457 in words is "two hundred twenty-eight million, three hundred ninety-one thousand, four hundred fifty-seven".