428737785 has 32 divisors (see below), whose sum is σ = 785313792. Its totient is φ = 195660480.

The previous prime is 428737783. The next prime is 428737787. The reversal of 428737785 is 587737824.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (428737783) and next prime (428737787).

It is not a de Polignac number, because 428737785 - 2¹ = 428737783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428737783) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64780 + ... + 71090.

It is an arithmetic number, because the mean of its divisors is an integer number (24541056).

Almost surely, 2^428737785 is an apocalyptic number.

It is an amenable number.

428737785 is a deficient number, since it is larger than the sum of its proper divisors (356576007).

428737785 is a wasteful number, since it uses less digits than its factorization.

428737785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6973.

The product of its digits is 2634240, while the sum is 51.

The square root of 428737785 is about 20705.9842799129. The cubic root of 428737785 is about 754.0449805126.

The spelling of 428737785 in words is "four hundred twenty-eight million, seven hundred thirty-seven thousand, seven hundred eighty-five".