252428378 has 8 divisors (see below), whose sum is σ = 378710580. Its totient is φ = 126191520.

The previous prime is 252428353. The next prime is 252428389. The reversal of 252428378 is 873824252.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 239847169 + 12581209 = 15487^2 + 3547^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13238 + ... + 26078.

Almost surely, 2^252428378 is an apocalyptic number.

252428378 is a deficient number, since it is larger than the sum of its proper divisors (126282202).

252428378 is a wasteful number, since it uses less digits than its factorization.

252428378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22672.

The product of its digits is 215040, while the sum is 41.

The square root of 252428378 is about 15887.9947759307. The cubic root of 252428378 is about 631.9936658154.

The spelling of 252428378 in words is "two hundred fifty-two million, four hundred twenty-eight thousand, three hundred seventy-eight".