420731395 has 24 divisors (see below), whose sum is σ = 589950000. Its totient is φ = 287203392.

The previous prime is 420731309. The next prime is 420731401. The reversal of 420731395 is 593137024.

It is not a de Polignac number, because 420731395 - 2⁹ = 420730883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420731395.

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 23 ways as a sum of consecutive naturals, for example, 52356 + ... + 59854.

It is an arithmetic number, because the mean of its divisors is an integer number (24581250).

Almost surely, 2^420731395 is an apocalyptic number.

420731395 is a deficient number, since it is larger than the sum of its proper divisors (169218605).

420731395 is a wasteful number, since it uses less digits than its factorization.

420731395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7747 (or 7740 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 420731395 is about 20511.7379809708. The cubic root of 420731395 is about 749.3216948693.

The spelling of 420731395 in words is "four hundred twenty million, seven hundred thirty-one thousand, three hundred ninety-five".