428770897636 has 27 divisors (see below), whose sum is σ = 797125004809. Its totient is φ = 201764063168.

The previous prime is 428770897603. The next prime is 428770897729. The reversal of 428770897636 is 636798077824.

The square root of 428770897636 is 654806.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 333818172900 + 94952724736 = 577770^2 + 308144^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 22253775 + ... + 22273033.

Almost surely, 2^428770897636 is an apocalyptic number.

428770897636 is the 654806-th square number.

It is an amenable number.

428770897636 is a deficient number, since it is larger than the sum of its proper divisors (368354107173).

428770897636 is an frugal number, since it uses more digits than its factorization.

428770897636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38556 (or 19278 counting only the distinct ones).

The product of its (nonzero) digits is 170698752, while the sum is 67.

The spelling of 428770897636 in words is "four hundred twenty-eight billion, seven hundred seventy million, eight hundred ninety-seven thousand, six hundred thirty-six".