421038778 has 8 divisors (see below), whose sum is σ = 631829268. Its totient is φ = 210429024.

The previous prime is 421038767. The next prime is 421038811. The reversal of 421038778 is 877830124.

It can be written as a sum of positive squares in 2 ways, for example, as 299532249 + 121506529 = 17307^2 + 11023^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 421038778.

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, 39201 + ... + 48772.

Almost surely, 2^421038778 is an apocalyptic number.

421038778 is a deficient number, since it is larger than the sum of its proper divisors (210790490).

421038778 is a wasteful number, since it uses less digits than its factorization.

421038778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90368.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 421038778 is about 20519.2294689640. The cubic root of 421038778 is about 749.5041332642.

The spelling of 421038778 in words is "four hundred twenty-one million, thirty-eight thousand, seven hundred seventy-eight".