428840149 has 2 divisors, whose sum is σ = 428840150. Its totient is φ = 428840148.

The previous prime is 428840141. The next prime is 428840183. The reversal of 428840149 is 941048824.

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., 233539524 + 195300625 = 15282^2 + 13975^2 .

It is a cyclic number.

It is not a de Polignac number, because 428840149 - 2³ = 428840141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428840141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214420074 + 214420075.

It is an arithmetic number, because the mean of its divisors is an integer number (214420075).

Almost surely, 2^428840149 is an apocalyptic number.

It is an amenable number.

428840149 is a deficient number, since it is larger than the sum of its proper divisors (1).

428840149 is an equidigital number, since it uses as much as digits as its factorization.

428840149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 428840149 is about 20708.4559781747. The cubic root of 428840149 is about 754.1049868233.

The spelling of 428840149 in words is "four hundred twenty-eight million, eight hundred forty thousand, one hundred forty-nine".