1641233408 has 44 divisors (see below), whose sum is σ = 3286614072. Its totient is φ = 819179520.

The previous prime is 1641233317. The next prime is 1641233411. The reversal of 1641233408 is 8043321461.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 815123 + ... + 817133.

Almost surely, 2^1641233408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1641233408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1643307036).

1641233408 is an abundant number, since it is smaller than the sum of its proper divisors (1645380664).

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

1641233408 is an equidigital number, since it uses as much as digits as its factorization.

1641233408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2828 (or 2810 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 1641233408 is about 40512.1390202986. The cubic root of 1641233408 is about 1179.5692692012.

Adding to 1641233408 its reverse (8043321461), we get a palindrome (9684554869).

The spelling of 1641233408 in words is "one billion, six hundred forty-one million, two hundred thirty-three thousand, four hundred eight".