1820631441 has 8 divisors (see below), whose sum is σ = 2434465600. Its totient is φ = 1210275792.

The previous prime is 1820631427. The next prime is 1820631443. The reversal of 1820631441 is 1441360281.

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

It is not a de Polignac number, because 1820631441 - 2⁶ = 1820631377 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1820631399 and 1820631408.

It is not an unprimeable number, because it can be changed into a prime (1820631443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 868405 + ... + 870498.

It is an arithmetic number, because the mean of its divisors is an integer number (304308200).

Almost surely, 2^1820631441 is an apocalyptic number.

It is an amenable number.

1820631441 is a deficient number, since it is larger than the sum of its proper divisors (613834159).

1820631441 is a wasteful number, since it uses less digits than its factorization.

1820631441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739255.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 1820631441 is about 42668.8579762805. The cubic root of 1820631441 is about 1221.0703320878.

The spelling of 1820631441 in words is "one billion, eight hundred twenty million, six hundred thirty-one thousand, four hundred forty-one".