1393627644 has 144 divisors (see below), whose sum is σ = 3746590848. Its totient is φ = 436230144.

The previous prime is 1393627643. The next prime is 1393627657. The reversal of 1393627644 is 4467263931.

1393627644 is a `hidden beast` number, since 13 + 9 + 3 + 627 + 6 + 4 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1393627644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1393627643) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7074154 + ... + 7074350.

It is an arithmetic number, because the mean of its divisors is an integer number (26017992).

Almost surely, 2^1393627644 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 1393627644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1873295424).

1393627644 is an abundant number, since it is smaller than the sum of its proper divisors (2352963204).

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

1393627644 is a wasteful number, since it uses less digits than its factorization.

1393627644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404 (or 399 counting only the distinct ones).

The product of its digits is 653184, while the sum is 45.

The square root of 1393627644 is about 37331.3225589451. The cubic root of 1393627644 is about 1116.9890545904.

The spelling of 1393627644 in words is "one billion, three hundred ninety-three million, six hundred twenty-seven thousand, six hundred forty-four".