428077783 has 4 divisors (see below), whose sum is σ = 489231760. Its totient is φ = 366923808.

The previous prime is 428077777. The next prime is 428077801. The reversal of 428077783 is 387770824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 428077783 - 2²⁵ = 394523351 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428077483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30576978 + ... + 30576991.

It is an arithmetic number, because the mean of its divisors is an integer number (122307940).

Almost surely, 2^428077783 is an apocalyptic number.

428077783 is a deficient number, since it is larger than the sum of its proper divisors (61153977).

428077783 is an equidigital number, since it uses as much as digits as its factorization.

428077783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61153976.

The product of its (nonzero) digits is 526848, while the sum is 46.

The square root of 428077783 is about 20690.0406717822. The cubic root of 428077783 is about 753.6578543918.

The spelling of 428077783 in words is "four hundred twenty-eight million, seventy-seven thousand, seven hundred eighty-three".