1820398746 has 8 divisors (see below), whose sum is σ = 3640797504. Its totient is φ = 606799580.

The previous prime is 1820398669. The next prime is 1820398747. The reversal of 1820398746 is 6478930281.

It is a sphenic number, since it is the product of 3 distinct primes.

1820398746 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1820398695 and 1820398704.

It is not an unprimeable number, because it can be changed into a prime (1820398747) 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, 151699890 + ... + 151699901.

It is an arithmetic number, because the mean of its divisors is an integer number (455099688).

Almost surely, 2^1820398746 is an apocalyptic number.

1820398746 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1820398746 is a wasteful number, since it uses less digits than its factorization.

1820398746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303399796.

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 1820398746 is about 42666.1311346600. The cubic root of 1820398746 is about 1221.0183081836.

The spelling of 1820398746 in words is "one billion, eight hundred twenty million, three hundred ninety-eight thousand, seven hundred forty-six".