420764810 has 16 divisors (see below), whose sum is σ = 758839752. Its totient is φ = 167980800.

The previous prime is 420764809. The next prime is 420764819. The reversal of 420764810 is 18467024.

It can be written as a sum of positive squares in 4 ways, for example, as 240963529 + 179801281 = 15523^2 + 13409^2 .

It is a super-2 number, since 2×420764810² = 354086050668672200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (420764819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35171 + ... + 45590.

Almost surely, 2^420764810 is an apocalyptic number.

420764810 is a deficient number, since it is larger than the sum of its proper divisors (338074942).

420764810 is a wasteful number, since it uses less digits than its factorization.

420764810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81289.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 420764810 is about 20512.5524984094. The cubic root of 420764810 is about 749.3415316915.

The spelling of 420764810 in words is "four hundred twenty million, seven hundred sixty-four thousand, eight hundred ten".