1378351028 has 6 divisors (see below), whose sum is σ = 2412114306. Its totient is φ = 689175512.

The previous prime is 1378351027. The next prime is 1378351057. The reversal of 1378351028 is 8201538731.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1032465424 + 345885604 = 32132^2 + 18598^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1378350982 and 1378351000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378351027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172293875 + ... + 172293882.

It is an arithmetic number, because the mean of its divisors is an integer number (402019051).

Almost surely, 2^1378351028 is an apocalyptic number.

It is an amenable number.

1378351028 is a deficient number, since it is larger than the sum of its proper divisors (1033763278).

1378351028 is a wasteful number, since it uses less digits than its factorization.

1378351028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344587761 (or 344587759 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 1378351028 is about 37126.1501909368. The cubic root of 1378351028 is about 1112.8926602484.

Adding to 1378351028 its reverse (8201538731), we get a palindrome (9579889759).

The spelling of 1378351028 in words is "one billion, three hundred seventy-eight million, three hundred fifty-one thousand, twenty-eight".