1398376825 has 12 divisors (see below), whose sum is σ = 1737863100. Its totient is φ = 1116200960.

The previous prime is 1398376817. The next prime is 1398376829. The reversal of 1398376825 is 5286738931.

It can be written as a sum of positive squares in 6 ways, for example, as 9174841 + 1389201984 = 3029^2 + 37272^2 .

It is not a de Polignac number, because 1398376825 - 2³ = 1398376817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1398376829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51064 + ... + 73513.

It is an arithmetic number, because the mean of its divisors is an integer number (144821925).

Almost surely, 2^1398376825 is an apocalyptic number.

It is an amenable number.

1398376825 is a deficient number, since it is larger than the sum of its proper divisors (339486275).

1398376825 is a wasteful number, since it uses less digits than its factorization.

1398376825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125036 (or 125031 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 52.

The square root of 1398376825 is about 37394.8769886999. The cubic root of 1398376825 is about 1118.2564349054.

The spelling of 1398376825 in words is "one billion, three hundred ninety-eight million, three hundred seventy-six thousand, eight hundred twenty-five".