1428604685 has 16 divisors (see below), whose sum is σ = 1732280880. Its totient is φ = 1130941440.

The previous prime is 1428604679. The next prime is 1428604687. The reversal of 1428604685 is 5864068241.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 54493924 + 1374110761 = 7382^2 + 37069^2 .

It is not a de Polignac number, because 1428604685 - 2¹⁸ = 1428342541 is a prime.

It is a super-2 number, since 2×1428604685² = 4081822692007898450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428604687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 660005 + ... + 662165.

It is an arithmetic number, because the mean of its divisors is an integer number (108267555).

Almost surely, 2^1428604685 is an apocalyptic number.

It is an amenable number.

1428604685 is a deficient number, since it is larger than the sum of its proper divisors (303676195).

1428604685 is a wasteful number, since it uses less digits than its factorization.

1428604685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3488.

The product of its (nonzero) digits is 368640, while the sum is 44.

The square root of 1428604685 is about 37796.8872395598. The cubic root of 1428604685 is about 1126.2566198716.

The spelling of 1428604685 in words is "one billion, four hundred twenty-eight million, six hundred four thousand, six hundred eighty-five".