1331144400 has 60 divisors (see below), whose sum is σ = 4264103072. Its totient is φ = 354971520.

The previous prime is 1331144369. The next prime is 1331144401. The reversal of 1331144400 is 44411331.

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331144401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 553444 + ... + 555843.

Almost surely, 2^1331144400 is an apocalyptic number.

1331144400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331144400 is an abundant number, since it is smaller than the sum of its proper divisors (2932958672).

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

1331144400 is a wasteful number, since it uses less digits than its factorization.

1331144400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109308 (or 1109297 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1331144400 is about 36484.8516510620. The cubic root of 1331144400 is about 1100.0397781759.

Adding to 1331144400 its reverse (44411331), we get a palindrome (1375555731).

The spelling of 1331144400 in words is "one billion, three hundred thirty-one million, one hundred forty-four thousand, four hundred".