428440390537 has 2 divisors, whose sum is σ = 428440390538. Its totient is φ = 428440390536.

The previous prime is 428440390517. The next prime is 428440390601. The reversal of 428440390537 is 735093044824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 427145902096 + 1294488441 = 653564^2 + 35979^2 .

It is a cyclic number.

It is not a de Polignac number, because 428440390537 - 2⁷ = 428440390409 is a prime.

It is a super-2 number, since 2×428440390537² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (428440390517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214220195268 + 214220195269.

It is an arithmetic number, because the mean of its divisors is an integer number (214220195269).

Almost surely, 2^428440390537 is an apocalyptic number.

It is an amenable number.

428440390537 is a deficient number, since it is larger than the sum of its proper divisors (1).

428440390537 is an equidigital number, since it uses as much as digits as its factorization.

428440390537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 49.

The spelling of 428440390537 in words is "four hundred twenty-eight billion, four hundred forty million, three hundred ninety thousand, five hundred thirty-seven".