1390286909 has 8 divisors (see below), whose sum is σ = 1518279552. Its totient is φ = 1262561440.

The previous prime is 1390286903. The next prime is 1390286921. The reversal of 1390286909 is 9096820931.

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

It is a cyclic number.

It is not a de Polignac number, because 1390286909 - 2²⁴ = 1373509693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390286903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55829 + ... + 76794.

It is an arithmetic number, because the mean of its divisors is an integer number (189784944).

Almost surely, 2^1390286909 is an apocalyptic number.

It is an amenable number.

1390286909 is a deficient number, since it is larger than the sum of its proper divisors (127992643).

1390286909 is a wasteful number, since it uses less digits than its factorization.

1390286909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133587.

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 1390286909 is about 37286.5513154542. The cubic root of 1390286909 is about 1116.0958102269.

The spelling of 1390286909 in words is "one billion, three hundred ninety million, two hundred eighty-six thousand, nine hundred nine".