420004278 has 60 divisors (see below), whose sum is σ = 999848652. Its totient is φ = 131751360.

The previous prime is 420004241. The next prime is 420004301. The reversal of 420004278 is 872400024.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 42333 + ... + 51303.

Almost surely, 2^420004278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420004278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (499924326).

420004278 is an abundant number, since it is smaller than the sum of its proper divisors (579844374).

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

420004278 is a wasteful number, since it uses less digits than its factorization.

420004278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9019 (or 8993 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 420004278 is about 20494.0059041662. The cubic root of 420004278 is about 748.8897813637.

The spelling of 420004278 in words is "four hundred twenty million, four thousand, two hundred seventy-eight".