1815696 has 60 divisors (see below), whose sum is σ = 5280912. Its totient is φ = 603936.

The previous prime is 1815691. The next prime is 1815703. The reversal of 1815696 is 6965181.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 1815696.

It is not an unprimeable number, because it can be changed into a prime (1815691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3655 + ... + 4121.

2^1815696 is an apocalyptic number.

1815696 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 1815696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2640456).

1815696 is an abundant number, since it is smaller than the sum of its proper divisors (3465216).

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

1815696 is an equidigital number, since it uses as much as digits as its factorization.

1815696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490 (or 472 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 1815696 is about 1347.4776435993. The cubic root of 1815696 is about 121.9965958022.

The spelling of 1815696 in words is "one million, eight hundred fifteen thousand, six hundred ninety-six".