1386309790 has 32 divisors (see below), whose sum is σ = 2572067520. Its totient is φ = 537734400.

The previous prime is 1386309779. The next prime is 1386309803. The reversal of 1386309790 is 979036831.

It is a self number, because there is not a number n which added to its sum of digits gives 1386309790.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27306 + ... + 59314.

It is an arithmetic number, because the mean of its divisors is an integer number (80377110).

Almost surely, 2^1386309790 is an apocalyptic number.

1386309790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1386309790 is a deficient number, since it is larger than the sum of its proper divisors (1185757730).

1386309790 is a wasteful number, since it uses less digits than its factorization.

1386309790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32148.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 1386309790 is about 37233.1813037780. The cubic root of 1386309790 is about 1115.0305420391.

The spelling of 1386309790 in words is "one billion, three hundred eighty-six million, three hundred nine thousand, seven hundred ninety".