1331436428 has 36 divisors (see below), whose sum is σ = 2712756312. Its totient is φ = 570124800.

The previous prime is 1331436427. The next prime is 1331436433. The reversal of 1331436428 is 8246341331.

It is not an unprimeable number, because it can be changed into a prime (1331436427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 311675 + ... + 315917.

It is an arithmetic number, because the mean of its divisors is an integer number (75354342).

Almost surely, 2^1331436428 is an apocalyptic number.

It is an amenable number.

1331436428 is an abundant number, since it is smaller than the sum of its proper divisors (1381319884).

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

1331436428 is a wasteful number, since it uses less digits than its factorization.

1331436428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5862 (or 5853 counting only the distinct ones).

The product of its digits is 41472, while the sum is 35.

The square root of 1331436428 is about 36488.8534760960. The cubic root of 1331436428 is about 1100.1202149608.

Adding to 1331436428 its reverse (8246341331), we get a palindrome (9577777759).

The spelling of 1331436428 in words is "one billion, three hundred thirty-one million, four hundred thirty-six thousand, four hundred twenty-eight".