1298628 has 18 divisors (see below), whose sum is σ = 3282734. Its totient is φ = 432864.

The previous prime is 1298617. The next prime is 1298641. The reversal of 1298628 is 8268921.

1298628 is a `hidden beast` number, since 1 + 29 + 8 + 628 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1272384 + 26244 = 1128^2 + 162^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 36073 = 1298628 / (1 + 2 + 9 + 8 + 6 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 1298592 and 1298601.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18001 + ... + 18072.

2^1298628 is an apocalyptic number.

1298628 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1298628 is an abundant number, since it is smaller than the sum of its proper divisors (1984106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1298628 is a wasteful number, since it uses less digits than its factorization.

1298628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36083 (or 36078 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 1298628 is about 1139.5736044679. The cubic root of 1298628 is about 109.1008801492.

The spelling of 1298628 in words is "one million, two hundred ninety-eight thousand, six hundred twenty-eight".