1393243528 has 8 divisors (see below), whose sum is σ = 2612331630. Its totient is φ = 696621760.

The previous prime is 1393243519. The next prime is 1393243529. The reversal of 1393243528 is 8253423931.

It can be written as a sum of positive squares in only one way, i.e., 711929124 + 681314404 = 26682^2 + 26102^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1393243528² = 3882255056627773568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1393243529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 87077713 + ... + 87077728.

Almost surely, 2^1393243528 is an apocalyptic number.

It is an amenable number.

1393243528 is a deficient number, since it is larger than the sum of its proper divisors (1219088102).

1393243528 is a wasteful number, since it uses less digits than its factorization.

1393243528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174155447 (or 174155443 counting only the distinct ones).

The product of its digits is 155520, while the sum is 40.

The square root of 1393243528 is about 37326.1775165901. The cubic root of 1393243528 is about 1116.8864224910.

The spelling of 1393243528 in words is "one billion, three hundred ninety-three million, two hundred forty-three thousand, five hundred twenty-eight".