428284157 has 6 divisors (see below), whose sum is σ = 498208158. Its totient is φ = 367100664.

The previous prime is 428284147. The next prime is 428284193. The reversal of 428284157 is 751482824.

It can be written as a sum of positive squares in only one way, i.e., 215678596 + 212605561 = 14686^2 + 14581^2 .

It is not a de Polignac number, because 428284157 - 2¹⁴ = 428267773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428284147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4370198 + ... + 4370295.

It is an arithmetic number, because the mean of its divisors is an integer number (83034693).

Almost surely, 2^428284157 is an apocalyptic number.

It is an amenable number.

428284157 is a deficient number, since it is larger than the sum of its proper divisors (69924001).

428284157 is an equidigital number, since it uses as much as digits as its factorization.

428284157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8740507 (or 8740500 counting only the distinct ones).

The product of its digits is 143360, while the sum is 41.

The square root of 428284157 is about 20695.0273495833. The cubic root of 428284157 is about 753.7789464025.

The spelling of 428284157 in words is "four hundred twenty-eight million, two hundred eighty-four thousand, one hundred fifty-seven".