1326633420 has 384 divisors, whose sum is σ = 4790016000. Its totient is φ = 267337728.

The previous prime is 1326633419. The next prime is 1326633439. The reversal of 1326633420 is 243366231.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 8903506 + ... + 8903654.

It is an arithmetic number, because the mean of its divisors is an integer number (12474000).

Almost surely, 2^1326633420 is an apocalyptic number.

1326633420 is a gapful number since it is divisible by the number (10) 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 1326633420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2395008000).

1326633420 is an abundant number, since it is smaller than the sum of its proper divisors (3463382580).

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

1326633420 is a wasteful number, since it uses less digits than its factorization.

1326633420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 30.

The square root of 1326633420 is about 36422.9792850612. The cubic root of 1326633420 is about 1098.7957675389.

Adding to 1326633420 its reverse (243366231), we get a palindrome (1569999651).

The spelling of 1326633420 in words is "one billion, three hundred twenty-six million, six hundred thirty-three thousand, four hundred twenty".