1861696 has 28 divisors (see below), whose sum is σ = 3891280. Its totient is φ = 881280.

The previous prime is 1861663. The next prime is 1861697. The reversal of 1861696 is 6961681.

It is not an unprimeable number, because it can be changed into a prime (1861697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451 + ... + 1981.

2^1861696 is an apocalyptic number.

1861696 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 1861696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1945640).

1861696 is an abundant number, since it is smaller than the sum of its proper divisors (2029584).

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

1861696 is a wasteful number, since it uses less digits than its factorization.

1861696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1562 (or 1552 counting only the distinct ones).

The product of its digits is 15552, while the sum is 37.

The square root of 1861696 is about 1364.4398117909. The cubic root of 1861696 is about 123.0182624304.

The spelling of 1861696 in words is "one million, eight hundred sixty-one thousand, six hundred ninety-six".