1378535612 has 6 divisors (see below), whose sum is σ = 2412437328. Its totient is φ = 689267804.

The previous prime is 1378535611. The next prime is 1378535687. The reversal of 1378535612 is 2165358731.

It is a self number, because there is not a number n which added to its sum of digits gives 1378535612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378535611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172316948 + ... + 172316955.

It is an arithmetic number, because the mean of its divisors is an integer number (402072888).

Almost surely, 2^1378535612 is an apocalyptic number.

It is an amenable number.

1378535612 is a deficient number, since it is larger than the sum of its proper divisors (1033901716).

1378535612 is a wasteful number, since it uses less digits than its factorization.

1378535612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344633907 (or 344633905 counting only the distinct ones).

The product of its digits is 151200, while the sum is 41.

The square root of 1378535612 is about 37128.6360104973. The cubic root of 1378535612 is about 1112.9423362757.

The spelling of 1378535612 in words is "one billion, three hundred seventy-eight million, five hundred thirty-five thousand, six hundred twelve".