428849477956 has 9 divisors (see below), whose sum is σ = 750488878461. Its totient is φ = 214424084112.

The previous prime is 428849477951. The next prime is 428849477981. The reversal of 428849477956 is 659774948824.

The square root of 428849477956 is 654866.

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., 293731480900 + 135117997056 = 541970^2 + 367584^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428849477951) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1146016 + ... + 1473448.

Almost surely, 2^428849477956 is an apocalyptic number.

428849477956 is the 654866-th square number.

It is an amenable number.

428849477956 is a deficient number, since it is larger than the sum of its proper divisors (321639400505).

428849477956 is an frugal number, since it uses more digits than its factorization.

428849477956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654870 (or 327435 counting only the distinct ones).

The product of its digits is 975421440, while the sum is 73.

The spelling of 428849477956 in words is "four hundred twenty-eight billion, eight hundred forty-nine million, four hundred seventy-seven thousand, nine hundred fifty-six".