1347428220 has 48 divisors (see below), whose sum is σ = 3860545920. Its totient is φ = 350957376.

The previous prime is 1347428213. The next prime is 1347428221. The reversal of 1347428220 is 228247431.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1347428221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 258550 + ... + 263709.

It is an arithmetic number, because the mean of its divisors is an integer number (80428040).

Almost surely, 2^1347428220 is an apocalyptic number.

1347428220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1347428220 is an abundant number, since it is smaller than the sum of its proper divisors (2513117700).

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

1347428220 is a wasteful number, since it uses less digits than its factorization.

1347428220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522314 (or 522312 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 1347428220 is about 36707.3319651538. The cubic root of 1347428220 is about 1104.5071872742.

The spelling of 1347428220 in words is "one billion, three hundred forty-seven million, four hundred twenty-eight thousand, two hundred twenty".