420205628 has 12 divisors (see below), whose sum is σ = 740296200. Its totient is φ = 208692432.

The previous prime is 420205613. The next prime is 420205631. The reversal of 420205628 is 826502024.

It is a self number, because there is not a number n which added to its sum of digits gives 420205628.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351926 + ... + 353117.

It is an arithmetic number, because the mean of its divisors is an integer number (61691350).

Almost surely, 2^420205628 is an apocalyptic number.

It is an amenable number.

420205628 is a deficient number, since it is larger than the sum of its proper divisors (320090572).

420205628 is a wasteful number, since it uses less digits than its factorization.

420205628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705196 (or 705194 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 420205628 is about 20498.9177275289. The cubic root of 420205628 is about 749.0094348019.

The spelling of 420205628 in words is "four hundred twenty million, two hundred five thousand, six hundred twenty-eight".