1397534436 has 144 divisors (see below), whose sum is σ = 4065384960. Its totient is φ = 401863680.

The previous prime is 1397534429. The next prime is 1397534459. The reversal of 1397534436 is 6344357931.

1397534436 is a `hidden beast` number, since 139 + 75 + 3 + 443 + 6 = 666.

1397534436 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1397534391 and 1397534400.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 358530 + ... + 362406.

It is an arithmetic number, because the mean of its divisors is an integer number (28231840).

Almost surely, 2^1397534436 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 1397534436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2032692480).

1397534436 is an abundant number, since it is smaller than the sum of its proper divisors (2667850524).

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

1397534436 is a wasteful number, since it uses less digits than its factorization.

1397534436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3954 (or 3949 counting only the distinct ones).

The product of its digits is 816480, while the sum is 45.

The square root of 1397534436 is about 37383.6118640241. The cubic root of 1397534436 is about 1118.0318420958.

The spelling of 1397534436 in words is "one billion, three hundred ninety-seven million, five hundred thirty-four thousand, four hundred thirty-six".