1397855232 has 220 divisors, whose sum is σ = 4398921120. Its totient is φ = 440930304.

The previous prime is 1397855219. The next prime is 1397855269. The reversal of 1397855232 is 2325587931.

1397855232 is a `hidden beast` number, since 1 + 3 + 97 + 8 + 552 + 3 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1575493 + ... + 1576379.

It is an arithmetic number, because the mean of its divisors is an integer number (19995096).

Almost surely, 2^1397855232 is an apocalyptic number.

1397855232 is a gapful number since it is divisible by the number (12) 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 1397855232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2199460560).

1397855232 is an abundant number, since it is smaller than the sum of its proper divisors (3001065888).

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

1397855232 is an equidigital number, since it uses as much as digits as its factorization.

1397855232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938 (or 911 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 1397855232 is about 37387.9022144864. The cubic root of 1397855232 is about 1118.1173814796.

The spelling of 1397855232 in words is "one billion, three hundred ninety-seven million, eight hundred fifty-five thousand, two hundred thirty-two".