428957437 has 2 divisors, whose sum is σ = 428957438. Its totient is φ = 428957436.

The previous prime is 428957411. The next prime is 428957443. The reversal of 428957437 is 734759824.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228281881 + 200675556 = 15109^2 + 14166^2 .

It is a cyclic number.

It is not a de Polignac number, because 428957437 - 2¹¹ = 428955389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428957497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214478718 + 214478719.

It is an arithmetic number, because the mean of its divisors is an integer number (214478719).

Almost surely, 2^428957437 is an apocalyptic number.

It is an amenable number.

428957437 is a deficient number, since it is larger than the sum of its proper divisors (1).

428957437 is an equidigital number, since it uses as much as digits as its factorization.

428957437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 49.

The square root of 428957437 is about 20711.2876712193. The cubic root of 428957437 is about 754.1737299231.

The spelling of 428957437 in words is "four hundred twenty-eight million, nine hundred fifty-seven thousand, four hundred thirty-seven".