1428878938 has 4 divisors (see below), whose sum is σ = 2143318410. Its totient is φ = 714439468.

The previous prime is 1428878881. The next prime is 1428878959. The reversal of 1428878938 is 8398788241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8398788241 = 1187 ⋅7075643.

It can be written as a sum of positive squares in only one way, i.e., 1366263369 + 62615569 = 36963^2 + 7913^2 .

It is a super-3 number, since 3×1428878938³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 357219733 + ... + 357219736.

Almost surely, 2^1428878938 is an apocalyptic number.

1428878938 is a deficient number, since it is larger than the sum of its proper divisors (714439472).

1428878938 is an equidigital number, since it uses as much as digits as its factorization.

1428878938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714439471.

The product of its digits is 6193152, while the sum is 58.

The square root of 1428878938 is about 37800.5150494011. The cubic root of 1428878938 is about 1126.3286854091.

The spelling of 1428878938 in words is "one billion, four hundred twenty-eight million, eight hundred seventy-eight thousand, nine hundred thirty-eight".