1393250128 has 20 divisors (see below), whose sum is σ = 2717543700. Its totient is φ = 691948544.

The previous prime is 1393250101. The next prime is 1393250129. The reversal of 1393250128 is 8210523931.

It can be written as a sum of positive squares in 2 ways, for example, as 214563904 + 1178686224 = 14648^2 + 34332^2 .

It is a super-2 number, since 2×1393250128² = 3882291838344032768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1393250093 and 1393250102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1393250129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289825 + ... + 294592.

It is an arithmetic number, because the mean of its divisors is an integer number (135877185).

Almost surely, 2^1393250128 is an apocalyptic number.

It is an amenable number.

1393250128 is a deficient number, since it is larger than the sum of its proper divisors (1324293572).

1393250128 is a wasteful number, since it uses less digits than its factorization.

1393250128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584574 (or 584568 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 1393250128 is about 37326.2659262884. The cubic root of 1393250128 is about 1116.8881861067. Note that the first 3 decimals are identical.

The spelling of 1393250128 in words is "one billion, three hundred ninety-three million, two hundred fifty thousand, one hundred twenty-eight".