1397637120 has 360 divisors, whose sum is σ = 5020428672. Its totient is φ = 331612160.

The previous prime is 1397637023. The next prime is 1397637161. The reversal of 1397637120 is 217367931.

It is a happy number.

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, 29736937 + ... + 29736983.

Almost surely, 2^1397637120 is an apocalyptic number.

1397637120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1397637120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2510214336).

1397637120 is an abundant number, since it is smaller than the sum of its proper divisors (3622791552).

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

1397637120 is an equidigital number, since it uses as much as digits as its factorization.

1397637120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 47628, while the sum is 39.

The square root of 1397637120 is about 37384.9852213425. The cubic root of 1397637120 is about 1118.0592239303.

The spelling of 1397637120 in words is "one billion, three hundred ninety-seven million, six hundred thirty-seven thousand, one hundred twenty".