1386293890 has 8 divisors (see below), whose sum is σ = 2495329020. Its totient is φ = 554517552.

The previous prime is 1386293879. The next prime is 1386293891. The reversal of 1386293890 is 983926831.

It can be written as a sum of positive squares in 2 ways, for example, as 1328092249 + 58201641 = 36443^2 + 7629^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1386293891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69314685 + ... + 69314704.

Almost surely, 2^1386293890 is an apocalyptic number.

1386293890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1386293890 is a deficient number, since it is larger than the sum of its proper divisors (1109035130).

1386293890 is a wasteful number, since it uses less digits than its factorization.

1386293890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138629396.

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 1386293890 is about 37232.9677839412. The cubic root of 1386293890 is about 1115.0262791503.

The spelling of 1386293890 in words is "one billion, three hundred eighty-six million, two hundred ninety-three thousand, eight hundred ninety".