1331004420 has 48 divisors (see below), whose sum is σ = 4140904320. Its totient is φ = 354934368.

The previous prime is 1331004377. The next prime is 1331004461. The reversal of 1331004420 is 244001331.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1331004393 and 1331004402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1231872 + ... + 1232951.

It is an arithmetic number, because the mean of its divisors is an integer number (86268840).

Almost surely, 2^1331004420 is an apocalyptic number.

1331004420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331004420 is an abundant number, since it is smaller than the sum of its proper divisors (2809899900).

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

1331004420 is a wasteful number, since it uses less digits than its factorization.

1331004420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2464841 (or 2464833 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1331004420 is about 36482.9332702292. The cubic root of 1331004420 is about 1100.0012176295.

Adding to 1331004420 its reverse (244001331), we get a palindrome (1575005751).

The spelling of 1331004420 in words is "one billion, three hundred thirty-one million, four thousand, four hundred twenty".