1378772 has 6 divisors (see below), whose sum is σ = 2412858. Its totient is φ = 689384.

The previous prime is 1378763. The next prime is 1378777. The reversal of 1378772 is 2778731.

It can be written as a sum of positive squares in only one way, i.e., 1336336 + 42436 = 1156^2 + 206^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172343 + ... + 172350.

It is an arithmetic number, because the mean of its divisors is an integer number (402143).

2^1378772 is an apocalyptic number.

It is an amenable number.

1378772 is a deficient number, since it is larger than the sum of its proper divisors (1034086).

1378772 is a wasteful number, since it uses less digits than its factorization.

1378772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344697 (or 344695 counting only the distinct ones).

The product of its digits is 16464, while the sum is 35.

The square root of 1378772 is about 1174.2112246100. The cubic root of 1378772 is about 111.3005947539.

The spelling of 1378772 in words is "one million, three hundred seventy-eight thousand, seven hundred seventy-two".