421776478 has 8 divisors (see below), whose sum is σ = 665962920. Its totient is φ = 199788840.

The previous prime is 421776473. The next prime is 421776479. The reversal of 421776478 is 874677124.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421776473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5549653 + ... + 5549728.

It is an arithmetic number, because the mean of its divisors is an integer number (83245365).

Almost surely, 2^421776478 is an apocalyptic number.

421776478 is a deficient number, since it is larger than the sum of its proper divisors (244186442).

421776478 is a wasteful number, since it uses less digits than its factorization.

421776478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11099402.

The product of its digits is 526848, while the sum is 46.

The square root of 421776478 is about 20537.1974232124. The cubic root of 421776478 is about 749.9416120472.

The spelling of 421776478 in words is "four hundred twenty-one million, seven hundred seventy-six thousand, four hundred seventy-eight".