428758073 has 2 divisors, whose sum is σ = 428758074. Its totient is φ = 428758072.

The previous prime is 428758063. The next prime is 428758093. The reversal of 428758073 is 370857824.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 254306809 + 174451264 = 15947^2 + 13208^2 .

It is a cyclic number.

It is not a de Polignac number, because 428758073 - 2²⁰ = 427709497 is a prime.

It is not a weakly prime, because it can be changed into another prime (428758063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214379036 + 214379037.

It is an arithmetic number, because the mean of its divisors is an integer number (214379037).

Almost surely, 2^428758073 is an apocalyptic number.

It is an amenable number.

428758073 is a deficient number, since it is larger than the sum of its proper divisors (1).

428758073 is an equidigital number, since it uses as much as digits as its factorization.

428758073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 376320, while the sum is 44.

The square root of 428758073 is about 20706.4741807967. The cubic root of 428758073 is about 754.0568742029.

The spelling of 428758073 in words is "four hundred twenty-eight million, seven hundred fifty-eight thousand, seventy-three".