8420402 has 8 divisors (see below), whose sum is σ = 12656412. Its totient is φ = 4201600.

The previous prime is 8420393. The next prime is 8420407. The reversal of 8420402 is 2040248.

It can be written as a sum of positive squares in 2 ways, for example, as 8116801 + 303601 = 2849^2 + 551^2 .

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

It is not an unprimeable number, because it can be changed into a prime (8420407) 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, 2999 + ... + 5082.

Almost surely, 2^8420402 is an apocalyptic number.

8420402 is a deficient number, since it is larger than the sum of its proper divisors (4236010).

8420402 is a wasteful number, since it uses less digits than its factorization.

8420402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8604.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 8420402 is about 2901.7928940571. The cubic root of 8420402 is about 203.4437138450.

The spelling of 8420402 in words is "eight million, four hundred twenty thousand, four hundred two".