428966786 has 12 divisors (see below), whose sum is σ = 650521158. Its totient is φ = 212129472.

The previous prime is 428966777. The next prime is 428966803. The reversal of 428966786 is 687669824.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 373687561 + 55279225 = 19331^2 + 7435^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 287735 + ... + 289221.

Almost surely, 2^428966786 is an apocalyptic number.

428966786 is a deficient number, since it is larger than the sum of its proper divisors (221554372).

428966786 is an frugal number, since it uses more digits than its factorization.

428966786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3073 (or 1586 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 56.

The square root of 428966786 is about 20711.5133681728. The cubic root of 428966786 is about 754.1792088808.

It can be divided in two parts, 42896 and 6786, that multiplied together give a triangular number (291092256 = T₂₄₁₂₈).

The spelling of 428966786 in words is "four hundred twenty-eight million, nine hundred sixty-six thousand, seven hundred eighty-six".