420128378 has 8 divisors (see below), whose sum is σ = 667262772. Its totient is φ = 197707456.

The previous prime is 420128369. The next prime is 420128381. The reversal of 420128378 is 873821024.

It can be written as a sum of positive squares in 2 ways, for example, as 420127009 + 1369 = 20497^2 + 37^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6178325 + ... + 6178392.

Almost surely, 2^420128378 is an apocalyptic number.

420128378 is a deficient number, since it is larger than the sum of its proper divisors (247134394).

420128378 is a wasteful number, since it uses less digits than its factorization.

420128378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12356736.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 420128378 is about 20497.0333951038. The cubic root of 420128378 is about 748.9635330489.

The spelling of 420128378 in words is "four hundred twenty million, one hundred twenty-eight thousand, three hundred seventy-eight".