1331404436 has 24 divisors (see below), whose sum is σ = 2503843776. Its totient is φ = 617189760.

The previous prime is 1331404433. The next prime is 1331404457. The reversal of 1331404436 is 6344041331.

It is a junction number, because it is equal to n+sod(n) for n = 1331404399 and 1331404408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331404433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141560 + ... + 150671.

It is an arithmetic number, because the mean of its divisors is an integer number (104326824).

Almost surely, 2^1331404436 is an apocalyptic number.

It is an amenable number.

1331404436 is a deficient number, since it is larger than the sum of its proper divisors (1172439340).

1331404436 is a wasteful number, since it uses less digits than its factorization.

1331404436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292319 (or 292317 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 1331404436 is about 36488.4150930127. The cubic root of 1331404436 is about 1100.1114035931. Note that the first 3 decimals are identical.

Adding to 1331404436 its reverse (6344041331), we get a palindrome (7675445767).

The spelling of 1331404436 in words is "one billion, three hundred thirty-one million, four hundred four thousand, four hundred thirty-six".