1347221440 has 56 divisors (see below), whose sum is σ = 3396794832. Its totient is φ = 507187200.

The previous prime is 1347221431. The next prime is 1347221441. The reversal of 1347221440 is 441227431.

It is a junction number, because it is equal to n+sod(n) for n = 1347221399 and 1347221408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1347221441) 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, 118386 + ... + 129265.

Almost surely, 2^1347221440 is an apocalyptic number.

1347221440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1347221440 is an abundant number, since it is smaller than the sum of its proper divisors (2049573392).

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

1347221440 is a wasteful number, since it uses less digits than its factorization.

1347221440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247685 (or 247675 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 1347221440 is about 36704.5152535761. The cubic root of 1347221440 is about 1104.4506841578.

Adding to 1347221440 its reverse (441227431), we get a palindrome (1788448871).

The spelling of 1347221440 in words is "one billion, three hundred forty-seven million, two hundred twenty-one thousand, four hundred forty".