428724029 has 2 divisors, whose sum is σ = 428724030. Its totient is φ = 428724028.

The previous prime is 428724001. The next prime is 428724041. The reversal of 428724029 is 920427824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 346332100 + 82391929 = 18610^2 + 9077^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428724029 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 428723983 and 428724001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428720029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214362014 + 214362015.

It is an arithmetic number, because the mean of its divisors is an integer number (214362015).

Almost surely, 2^428724029 is an apocalyptic number.

It is an amenable number.

428724029 is a deficient number, since it is larger than the sum of its proper divisors (1).

428724029 is an equidigital number, since it uses as much as digits as its factorization.

428724029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 428724029 is about 20705.6521027472. The cubic root of 428724029 is about 754.0369159457.

The spelling of 428724029 in words is "four hundred twenty-eight million, seven hundred twenty-four thousand, twenty-nine".