1397271330 has 512 divisors, whose sum is σ = 4964198400. Its totient is φ = 271724544.

The previous prime is 1397271313. The next prime is 1397271331. The reversal of 1397271330 is 331727931.

It is not an unprimeable number, because it can be changed into a prime (1397271331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 26363584 + ... + 26363636.

It is an arithmetic number, because the mean of its divisors is an integer number (9695700).

Almost surely, 2^1397271330 is an apocalyptic number.

1397271330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1397271330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2482099200).

1397271330 is an abundant number, since it is smaller than the sum of its proper divisors (3566927070).

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

1397271330 is a wasteful number, since it uses less digits than its factorization.

1397271330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 23814, while the sum is 36.

The square root of 1397271330 is about 37380.0926965143. The cubic root of 1397271330 is about 1117.9616758229.

The spelling of 1397271330 in words is "one billion, three hundred ninety-seven million, two hundred seventy-one thousand, three hundred thirty".