1985672544 has 48 divisors (see below), whose sum is σ = 5323304448. Its totient is φ = 647806592.

The previous prime is 1985672537. The next prime is 1985672551. The reversal of 1985672544 is 4452765891.

It is an interprime number because it is at equal distance from previous prime (1985672537) and next prime (1985672551).

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 215532 + ... + 224555.

It is an arithmetic number, because the mean of its divisors is an integer number (110902176).

Almost surely, 2^1985672544 is an apocalyptic number.

It is an amenable number.

1985672544 is an abundant number, since it is smaller than the sum of its proper divisors (3337631904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1985672544 is a wasteful number, since it uses less digits than its factorization.

1985672544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440147 (or 440139 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 51.

The square root of 1985672544 is about 44560.8858080716. The cubic root of 1985672544 is about 1256.9052597216.

The spelling of 1985672544 in words is "one billion, nine hundred eighty-five million, six hundred seventy-two thousand, five hundred forty-four".