1656798 has 32 divisors (see below), whose sum is σ = 3894912. Its totient is φ = 463200.

The previous prime is 1656793. The next prime is 1656827. The reversal of 1656798 is 8976561.

It is a super-2 number, since 2×1656798² = 5489959225608, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108 + ... + 1823.

It is an arithmetic number, because the mean of its divisors is an integer number (121716).

2^1656798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1656798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1947456).

1656798 is an abundant number, since it is smaller than the sum of its proper divisors (2238114).

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

1656798 is a wasteful number, since it uses less digits than its factorization.

1656798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960.

The product of its digits is 90720, while the sum is 42.

The square root of 1656798 is about 1287.1666558764. The cubic root of 1656798 is about 118.3286347845.

The spelling of 1656798 in words is "one million, six hundred fifty-six thousand, seven hundred ninety-eight".