1331440434 has 12 divisors (see below), whose sum is σ = 2884787646. Its totient is φ = 443813472.

The previous prime is 1331440423. The next prime is 1331440471. The reversal of 1331440434 is 4340441331.

It can be written as a sum of positive squares in only one way, i.e., 1069486209 + 261954225 = 32703^2 + 16185^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1331440398 and 1331440407.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36984439 + ... + 36984474.

Almost surely, 2^1331440434 is an apocalyptic number.

1331440434 is an abundant number, since it is smaller than the sum of its proper divisors (1553347212).

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

1331440434 is a wasteful number, since it uses less digits than its factorization.

1331440434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73968921 (or 73968918 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 1331440434 is about 36488.9083695306. The cubic root of 1331440434 is about 1100.1213182998.

Adding to 1331440434 its reverse (4340441331), we get a palindrome (5671881765).

The spelling of 1331440434 in words is "one billion, three hundred thirty-one million, four hundred forty thousand, four hundred thirty-four".