421278380 has 24 divisors (see below), whose sum is σ = 888886320. Its totient is φ = 167711040.

The previous prime is 421278359. The next prime is 421278409. The reversal of 421278380 is 83872124.

It is a super-3 number, since 3×421278380³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 421278380.

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 7 ways as a sum of consecutive naturals, for example, 45695 + ... + 54134.

It is an arithmetic number, because the mean of its divisors is an integer number (37036930).

Almost surely, 2^421278380 is an apocalyptic number.

It is an amenable number.

421278380 is an abundant number, since it is smaller than the sum of its proper divisors (467607940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421278380 is a wasteful number, since it uses less digits than its factorization.

421278380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100049 (or 100047 counting only the distinct ones).

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

The square root of 421278380 is about 20525.0671131668. The cubic root of 421278380 is about 749.6462806104.

The spelling of 421278380 in words is "four hundred twenty-one million, two hundred seventy-eight thousand, three hundred eighty".