228751405 has 8 divisors (see below), whose sum is σ = 290648952. Its totient is φ = 172236288.

The previous prime is 228751381. The next prime is 228751409. The reversal of 228751405 is 504157822.

It is a happy number.

228751405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 50608996 + 178142409 = 7114^2 + 13347^2 .

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 228751405 - 2¹⁷ = 228620333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228751409) 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, 1345512 + ... + 1345681.

It is an arithmetic number, because the mean of its divisors is an integer number (36331119).

Almost surely, 2^228751405 is an apocalyptic number.

It is an amenable number.

228751405 is a deficient number, since it is larger than the sum of its proper divisors (61897547).

228751405 is a wasteful number, since it uses less digits than its factorization.

228751405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2691215.

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 228751405 is about 15124.5299100501. The cubic root of 228751405 is about 611.5818524689.

The spelling of 228751405 in words is "two hundred twenty-eight million, seven hundred fifty-one thousand, four hundred five".