428038697 has 2 divisors, whose sum is σ = 428038698. Its totient is φ = 428038696.

The previous prime is 428038693. The next prime is 428038739. The reversal of 428038697 is 796830824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 315275536 + 112763161 = 17756^2 + 10619^2 .

It is a cyclic number.

It is not a de Polignac number, because 428038697 - 2² = 428038693 is a prime.

It is a super-2 number, since 2×428038697² = 366434252258915618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (428038693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214019348 + 214019349.

It is an arithmetic number, because the mean of its divisors is an integer number (214019349).

Almost surely, 2^428038697 is an apocalyptic number.

It is an amenable number.

428038697 is a deficient number, since it is larger than the sum of its proper divisors (1).

428038697 is an equidigital number, since it uses as much as digits as its factorization.

428038697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 47.

The square root of 428038697 is about 20689.0960894864. The cubic root of 428038697 is about 753.6349159067.

The spelling of 428038697 in words is "four hundred twenty-eight million, thirty-eight thousand, six hundred ninety-seven".