428051777 has 2 divisors, whose sum is σ = 428051778. Its totient is φ = 428051776.

The previous prime is 428051773. The next prime is 428051807. The reversal of 428051777 is 777150824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 393665281 + 34386496 = 19841^2 + 5864^2 .

It is a cyclic number.

It is not a de Polignac number, because 428051777 - 2² = 428051773 is a prime.

It is not a weakly prime, because it can be changed into another prime (428051773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214025888 + 214025889.

It is an arithmetic number, because the mean of its divisors is an integer number (214025889).

Almost surely, 2^428051777 is an apocalyptic number.

It is an amenable number.

428051777 is a deficient number, since it is larger than the sum of its proper divisors (1).

428051777 is an equidigital number, since it uses as much as digits as its factorization.

428051777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109760, while the sum is 41.

The square root of 428051777 is about 20689.4121956135. The cubic root of 428051777 is about 753.6425923499.

The spelling of 428051777 in words is "four hundred twenty-eight million, fifty-one thousand, seven hundred seventy-seven".