1378273532 has 24 divisors (see below), whose sum is σ = 2496112080. Its totient is φ = 665383680.

The previous prime is 1378273531. The next prime is 1378273541. The reversal of 1378273532 is 2353728731.

It is a self number, because there is not a number n which added to its sum of digits gives 1378273532.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378273531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16157 + ... + 54932.

It is an arithmetic number, because the mean of its divisors is an integer number (104004670).

Almost surely, 2^1378273532 is an apocalyptic number.

It is an amenable number.

1378273532 is a deficient number, since it is larger than the sum of its proper divisors (1117838548).

1378273532 is a wasteful number, since it uses less digits than its factorization.

1378273532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71261 (or 71259 counting only the distinct ones).

The product of its digits is 211680, while the sum is 41.

The square root of 1378273532 is about 37125.1064914298. The cubic root of 1378273532 is about 1112.8718028751.

The spelling of 1378273532 in words is "one billion, three hundred seventy-eight million, two hundred seventy-three thousand, five hundred thirty-two".