420692906 has 8 divisors (see below), whose sum is σ = 642945924. Its totient is φ = 206377600.

The previous prime is 420692861. The next prime is 420692969. The reversal of 420692906 is 609296024.

It can be written as a sum of positive squares in 2 ways, for example, as 403809025 + 16883881 = 20095^2 + 4109^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 420692906.

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 3 ways as a sum of consecutive naturals, for example, 1984295 + ... + 1984506.

Almost surely, 2^420692906 is an apocalyptic number.

420692906 is a deficient number, since it is larger than the sum of its proper divisors (222253018).

420692906 is a wasteful number, since it uses less digits than its factorization.

420692906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3968856.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 420692906 is about 20510.7997406244. The cubic root of 420692906 is about 749.2988445642.

The spelling of 420692906 in words is "four hundred twenty million, six hundred ninety-two thousand, nine hundred six".