428261716 has 18 divisors (see below), whose sum is σ = 752849678. Its totient is φ = 213166080.

The previous prime is 428261651. The next prime is 428261723. The reversal of 428261716 is 617162824.

It can be written as a sum of positive squares in 3 ways, for example, as 370562500 + 57699216 = 19250^2 + 7596^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 263386 + ... + 265006.

Almost surely, 2^428261716 is an apocalyptic number.

It is an amenable number.

428261716 is a deficient number, since it is larger than the sum of its proper divisors (324587962).

428261716 is a wasteful number, since it uses less digits than its factorization.

428261716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139 (or 1880 counting only the distinct ones).

The product of its digits is 32256, while the sum is 37.

The square root of 428261716 is about 20694.4851590949. The cubic root of 428261716 is about 753.7657808063.

It can be divided in two parts, 428 and 261716, that added together give a 18-th power (262144 = 2¹⁸).

The spelling of 428261716 in words is "four hundred twenty-eight million, two hundred sixty-one thousand, seven hundred sixteen".