420509278 has 12 divisors (see below), whose sum is σ = 733745952. Its totient is φ = 180218220.

The previous prime is 420509269. The next prime is 420509279. The reversal of 420509278 is 872905024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420509279) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2145358 + ... + 2145553.

It is an arithmetic number, because the mean of its divisors is an integer number (61145496).

Almost surely, 2^420509278 is an apocalyptic number.

420509278 is a deficient number, since it is larger than the sum of its proper divisors (313236674).

420509278 is a wasteful number, since it uses less digits than its factorization.

420509278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4290927 (or 4290920 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 420509278 is about 20506.3228785660. The cubic root of 420509278 is about 749.1898083604.

The spelling of 420509278 in words is "four hundred twenty million, five hundred nine thousand, two hundred seventy-eight".