228756465 has 48 divisors (see below), whose sum is σ = 454536576. Its totient is φ = 104256000.

The previous prime is 228756461. The next prime is 228756469. The reversal of 228756465 is 564657822.

228756465 is a `hidden beast` number, since 2 + 2 + 87 + 564 + 6 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (228756461) and next prime (228756469).

It is not a de Polignac number, because 228756465 - 2² = 228756461 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 228756465.

It is not an unprimeable number, because it can be changed into a prime (228756461) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 125410 + ... + 127220.

It is an arithmetic number, because the mean of its divisors is an integer number (9469512).

Almost surely, 2^228756465 is an apocalyptic number.

It is an amenable number.

228756465 is a deficient number, since it is larger than the sum of its proper divisors (225780111).

228756465 is a wasteful number, since it uses less digits than its factorization.

228756465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2230 (or 2227 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The square root of 228756465 is about 15124.6971870514. The cubic root of 228756465 is about 611.5863618494.

The spelling of 228756465 in words is "two hundred twenty-eight million, seven hundred fifty-six thousand, four hundred sixty-five".