420770806 has 4 divisors (see below), whose sum is σ = 631156212. Its totient is φ = 210385402.

The previous prime is 420770767. The next prime is 420770813. The reversal of 420770806 is 608077024.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105192700 + ... + 105192703.

It is an arithmetic number, because the mean of its divisors is an integer number (157789053).

Almost surely, 2^420770806 is an apocalyptic number.

420770806 is a deficient number, since it is larger than the sum of its proper divisors (210385406).

420770806 is a wasteful number, since it uses less digits than its factorization.

420770806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210385405.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 420770806 is about 20512.6986522983. The cubic root of 420770806 is about 749.3450911071.

The spelling of 420770806 in words is "four hundred twenty million, seven hundred seventy thousand, eight hundred six".