1331204040 has 96 divisors (see below), whose sum is σ = 4580929080. Its totient is φ = 334104576.

The previous prime is 1331204027. The next prime is 1331204059. The reversal of 1331204040 is 404021331.

It can be written as a sum of positive squares in 4 ways, for example, as 1329477444 + 1726596 = 36462^2 + 1314^2 .

It is a super-2 number, since 2×1331204040² = 3544208392224643200, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 102639 + ... + 114878.

Almost surely, 2^1331204040 is an apocalyptic number.

1331204040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331204040 is an abundant number, since it is smaller than the sum of its proper divisors (3249725040).

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

1331204040 is a wasteful number, since it uses less digits than its factorization.

1331204040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217551 (or 217544 counting only the distinct ones).

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

The square root of 1331204040 is about 36485.6689674179. The cubic root of 1331204040 is about 1100.0562064944.

Adding to 1331204040 its reverse (404021331), we get a palindrome (1735225371).

The spelling of 1331204040 in words is "one billion, three hundred thirty-one million, two hundred four thousand, forty".