1098428 has 24 divisors (see below), whose sum is σ = 2058000. Its totient is φ = 511488.

The previous prime is 1098401. The next prime is 1098439. The reversal of 1098428 is 8248901.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1098394 and 1098403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7298 + ... + 7446.

It is an arithmetic number, because the mean of its divisors is an integer number (85750).

2^1098428 is an apocalyptic number.

It is an amenable number.

1098428 is a deficient number, since it is larger than the sum of its proper divisors (959572).

1098428 is a wasteful number, since it uses less digits than its factorization.

1098428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 1098428 is about 1048.0591586356. The cubic root of 1098428 is about 103.1788140313.

The spelling of 1098428 in words is "one million, ninety-eight thousand, four hundred twenty-eight".