1428628 has 12 divisors (see below), whose sum is σ = 2528820. Its totient is φ = 706112.

The previous prime is 1428613. The next prime is 1428631. The reversal of 1428628 is 8268241.

It can be written as a sum of positive squares in 2 ways, for example, as 743044 + 685584 = 862^2 + 828^2 .

It is a super-3 number, since 3×1428628³ = 8747394793334187456, which contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1428628.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1651 + ... + 2362.

It is an arithmetic number, because the mean of its divisors is an integer number (210735).

2^1428628 is an apocalyptic number.

It is an amenable number.

1428628 is a deficient number, since it is larger than the sum of its proper divisors (1100192).

1428628 is a wasteful number, since it uses less digits than its factorization.

1428628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4106 (or 4104 counting only the distinct ones).

The product of its digits is 6144, while the sum is 31.

The square root of 1428628 is about 1195.2522746266. The cubic root of 1428628 is about 112.6262746719.

The spelling of 1428628 in words is "one million, four hundred twenty-eight thousand, six hundred twenty-eight".