1958656 has 36 divisors (see below), whose sum is σ = 4472272. Its totient is φ = 838656.

The previous prime is 1958651. The next prime is 1958681. The reversal of 1958656 is 6568591.

It is not an unprimeable number, because it can be changed into a prime (1958651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1246 + ... + 2338.

2^1958656 is an apocalyptic number.

1958656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1958656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2236136).

1958656 is an abundant number, since it is smaller than the sum of its proper divisors (2513616).

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

1958656 is an equidigital number, since it uses as much as digits as its factorization.

1958656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116 (or 1102 counting only the distinct ones).

The product of its digits is 64800, while the sum is 40.

The square root of 1958656 is about 1399.5199176861. The cubic root of 1958656 is about 125.1178834596.

The spelling of 1958656 in words is "one million, nine hundred fifty-eight thousand, six hundred fifty-six".