1828443397 has 32 divisors (see below), whose sum is σ = 2237829120. Its totient is φ = 1474038720.

The previous prime is 1828443367. The next prime is 1828443403. The reversal of 1828443397 is 7933448281.

It is a happy number.

It is not a de Polignac number, because 1828443397 - 2¹⁵ = 1828410629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1828443397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1828443367) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 221883 + ... + 229975.

It is an arithmetic number, because the mean of its divisors is an integer number (69932160).

Almost surely, 2^1828443397 is an apocalyptic number.

It is an amenable number.

1828443397 is a deficient number, since it is larger than the sum of its proper divisors (409385723).

1828443397 is a wasteful number, since it uses less digits than its factorization.

1828443397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8193.

The product of its digits is 1161216, while the sum is 49.

The square root of 1828443397 is about 42760.3016476732. The cubic root of 1828443397 is about 1222.8142942282.

The spelling of 1828443397 in words is "one billion, eight hundred twenty-eight million, four hundred forty-three thousand, three hundred ninety-seven".