228649978 has 8 divisors (see below), whose sum is σ = 354801780. Its totient is φ = 110382720.

The previous prime is 228649951. The next prime is 228649979. The reversal of 228649978 is 879946822.

It can be written as a sum of positive squares in 2 ways, for example, as 208426969 + 20223009 = 14437^2 + 4497^2 .

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

It is not an unprimeable number, because it can be changed into a prime (228649979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1971063 + ... + 1971178.

Almost surely, 2^228649978 is an apocalyptic number.

228649978 is a deficient number, since it is larger than the sum of its proper divisors (126151802).

228649978 is a wasteful number, since it uses less digits than its factorization.

228649978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3942272.

The product of its digits is 3483648, while the sum is 55.

The square root of 228649978 is about 15121.1764753937. The cubic root of 228649978 is about 611.4914485319.

The spelling of 228649978 in words is "two hundred twenty-eight million, six hundred forty-nine thousand, nine hundred seventy-eight".