420265278 has 12 divisors (see below), whose sum is σ = 910574808. Its totient is φ = 140088420.

The previous prime is 420265247. The next prime is 420265289. The reversal of 420265278 is 872562024.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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 5 ways as a sum of consecutive naturals, for example, 11674018 + ... + 11674053.

It is an arithmetic number, because the mean of its divisors is an integer number (75881234).

Almost surely, 2^420265278 is an apocalyptic number.

420265278 is an abundant number, since it is smaller than the sum of its proper divisors (490309530).

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

420265278 is a wasteful number, since it uses less digits than its factorization.

420265278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23348079 (or 23348076 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 420265278 is about 20500.3726307597. The cubic root of 420265278 is about 749.0448748309.

The spelling of 420265278 in words is "four hundred twenty million, two hundred sixty-five thousand, two hundred seventy-eight".