1390392050 has 12 divisors (see below), whose sum is σ = 2586129306. Its totient is φ = 556156800.

The previous prime is 1390392043. The next prime is 1390392071. The reversal of 1390392050 is 502930931.

It can be written as a sum of positive squares in 3 ways, for example, as 1336560481 + 53831569 = 36559^2 + 7337^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1390391998 and 1390392016.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13903871 + ... + 13903970.

Almost surely, 2^1390392050 is an apocalyptic number.

1390392050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1390392050 is a deficient number, since it is larger than the sum of its proper divisors (1195737256).

1390392050 is a wasteful number, since it uses less digits than its factorization.

1390392050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27807853 (or 27807848 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 1390392050 is about 37287.9611939296. The cubic root of 1390392050 is about 1116.1239445807.

The spelling of 1390392050 in words is "one billion, three hundred ninety million, three hundred ninety-two thousand, fifty".