420894170 has 8 divisors (see below), whose sum is σ = 757609524. Its totient is φ = 168357664.

The previous prime is 420894167. The next prime is 420894179. The reversal of 420894170 is 71498024.

It can be written as a sum of positive squares in 2 ways, for example, as 361342081 + 59552089 = 19009^2 + 7717^2 .

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 420894170.

It is not an unprimeable number, because it can be changed into a prime (420894179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21044699 + ... + 21044718.

Almost surely, 2^420894170 is an apocalyptic number.

420894170 is a deficient number, since it is larger than the sum of its proper divisors (336715354).

420894170 is a wasteful number, since it uses less digits than its factorization.

420894170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42089424.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 420894170 is about 20515.7054472909. The cubic root of 420894170 is about 749.4183163829.

The spelling of 420894170 in words is "four hundred twenty million, eight hundred ninety-four thousand, one hundred seventy".