420640694 has 16 divisors (see below), whose sum is σ = 651043008. Its totient is φ = 203718912.

The previous prime is 420640691. The next prime is 420640733. The reversal of 420640694 is 496046024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420640691) 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, 13949 + ... + 32184.

It is an arithmetic number, because the mean of its divisors is an integer number (40690188).

Almost surely, 2^420640694 is an apocalyptic number.

420640694 is a deficient number, since it is larger than the sum of its proper divisors (230402314).

420640694 is a wasteful number, since it uses less digits than its factorization.

420640694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46279.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 420640694 is about 20509.5269082444. The cubic root of 420640694 is about 749.2678449052.

The spelling of 420640694 in words is "four hundred twenty million, six hundred forty thousand, six hundred ninety-four".