1397632 has 32 divisors (see below), whose sum is σ = 2845800. Its totient is φ = 683520.

The previous prime is 1397609. The next prime is 1397633. The reversal of 1397632 is 2367931.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 1397594 and 1397603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7719 + ... + 7897.

2^1397632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1397632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1422900).

1397632 is an abundant number, since it is smaller than the sum of its proper divisors (1448168).

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

1397632 is an equidigital number, since it uses as much as digits as its factorization.

1397632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 242 counting only the distinct ones).

The product of its digits is 6804, while the sum is 31.

The square root of 1397632 is about 1182.2148704867. The cubic root of 1397632 is about 111.8057858657.

Subtracting 1397632 from its reverse (2367931), we obtain a cube (970299 = 99³).

The spelling of 1397632 in words is "one million, three hundred ninety-seven thousand, six hundred thirty-two".