1390368449 has 4 divisors (see below), whose sum is σ = 1390530480. Its totient is φ = 1390206420.

The previous prime is 1390368437. The next prime is 1390368457. The reversal of 1390368449 is 9448630931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1390368449 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1390361449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67379 + ... + 85560.

It is an arithmetic number, because the mean of its divisors is an integer number (347632620).

Almost surely, 2^1390368449 is an apocalyptic number.

It is an amenable number.

1390368449 is a deficient number, since it is larger than the sum of its proper divisors (162031).

1390368449 is an equidigital number, since it uses as much as digits as its factorization.

1390368449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162030.

The product of its (nonzero) digits is 559872, while the sum is 47.

The square root of 1390368449 is about 37287.6447231519. The cubic root of 1390368449 is about 1116.1176293859.

The spelling of 1390368449 in words is "one billion, three hundred ninety million, three hundred sixty-eight thousand, four hundred forty-nine".