1655998 has 16 divisors (see below), whose sum is σ = 2580480. Its totient is φ = 796536.

The previous prime is 1655981. The next prime is 1655999. The reversal of 1655998 is 8995561.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7315 + ... + 7537.

It is an arithmetic number, because the mean of its divisors is an integer number (161280).

2^1655998 is an apocalyptic number.

1655998 is a deficient number, since it is larger than the sum of its proper divisors (924482).

1655998 is a wasteful number, since it uses less digits than its factorization.

1655998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351.

The product of its digits is 97200, while the sum is 43.

The square root of 1655998 is about 1286.8558582841. The cubic root of 1655998 is about 118.3095863653.

The spelling of 1655998 in words is "one million, six hundred fifty-five thousand, nine hundred ninety-eight".