1985438449 has 8 divisors (see below), whose sum is σ = 2116153728. Its totient is φ = 1856270400.

The previous prime is 1985438423. The next prime is 1985438461. The reversal of 1985438449 is 9448345891.

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 1985438449 - 2⁵ = 1985438417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1985438449.

It is not an unprimeable number, because it can be changed into a prime (1985438549) 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, 384157 + ... + 389290.

It is an arithmetic number, because the mean of its divisors is an integer number (264519216).

Almost surely, 2^1985438449 is an apocalyptic number.

It is an amenable number.

1985438449 is a deficient number, since it is larger than the sum of its proper divisors (130715279).

1985438449 is a wasteful number, since it uses less digits than its factorization.

1985438449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773615.

The product of its digits is 4976640, while the sum is 55.

The square root of 1985438449 is about 44558.2590436386. The cubic root of 1985438449 is about 1256.8558647360.

The spelling of 1985438449 in words is "one billion, nine hundred eighty-five million, four hundred thirty-eight thousand, four hundred forty-nine".