1996578 has 12 divisors (see below), whose sum is σ = 4325958. Its totient is φ = 665520.

The previous prime is 1996573. The next prime is 1996583. The reversal of 1996578 is 8756991.

It is an interprime number because it is at equal distance from previous prime (1996573) and next prime (1996583).

It can be written as a sum of positive squares in only one way, i.e., 1996569 + 9 = 1413^2 + 3^2 .

It is not an unprimeable number, because it can be changed into a prime (1996573) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55443 + ... + 55478.

2^1996578 is an apocalyptic number.

1996578 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1996578 is an abundant number, since it is smaller than the sum of its proper divisors (2329380).

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

1996578 is a wasteful number, since it uses less digits than its factorization.

1996578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110929 (or 110926 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 1996578 is about 1413.0031847098. The cubic root of 1996578 is about 125.9202064705.

The spelling of 1996578 in words is "one million, nine hundred ninety-six thousand, five hundred seventy-eight".