1390305449 has 64 divisors (see below), whose sum is σ = 1734082560. Its totient is φ = 1101703680.

The previous prime is 1390305439. The next prime is 1390305461. The reversal of 1390305449 is 9445030931.

It is a de Polignac number, because none of the positive numbers 2^k-1390305449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1390305419) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10947224 + ... + 10947350.

It is an arithmetic number, because the mean of its divisors is an integer number (27095040).

Almost surely, 2^1390305449 is an apocalyptic number.

1390305449 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1390305449 is a deficient number, since it is larger than the sum of its proper divisors (343777111).

1390305449 is a wasteful number, since it uses less digits than its factorization.

1390305449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 1390305449 is about 37286.7999297338. The cubic root of 1390305449 is about 1116.1007713910.

The spelling of 1390305449 in words is "one billion, three hundred ninety million, three hundred five thousand, four hundred forty-nine".